Do Underinflated Tires Kill Your Fuel Economy? Let's Find Out! | Ep. 1
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- Опубліковано 30 вер 2024
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( www.allTFL.com ) Check out our new spot to find ALL our TFLstudios content, from news to videos and our podcasts! It's a question that's often asked: How much will deflated tires hurt your MPG. Is the difference even noticeable? Andre finds out in this real-world test!
DISCLAIMER: Regardless of the results, we obviously don't recommend deflating your tires when driving on pavement for your safety and that of other motorists. We conducted this test strictly to see how fuel economy would be affected if your tires were at a far lower than the manufacturer-recommended PSI rating.
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#ram1500 #tiretest #mpgloop - Авто та транспорт
Its not that it will cost you 9 dollars more to fill up, but that you will have to fill up 46.8 miles sooner.
I was laughing when he said that. Glad you made this comment. It doesn’t matter the MPG. Still costs the same to fill up😂
Yeah, their math is generally a little fuzzy... to the point it's not true/borderline lying, ESPECIALLY when it comes to their EV coverage. They estimate/round and jump to conclusions that aren't true, the equivalent here would be saying 22.6 MPG is closer to 25 MPG, and 20.8 MPG is closer to 20 MPG, so your getting approximately 5 MPG LESS with underinflated tires! 🙄🙄 Uhh... no...
@@LVLifeguard - You are exaggerating yourself!! 😂😂😂. Forget your biases and learn not to hammer on someone in a man where what you are saying may be worse!! Too funny!!
Don’t forget the irregular tire wear
I think what Andre should have said is "It will cost you 10% more to go the same distance." Cost of fill up is based on fuel price and fuel capacity. Neither changed in this test. Only the maximum distance per tank is effected like you stated. 10% less distance is the result which will cost you over time.
You guys should do over inflated tires also
Mileage will probably go up due to lower rolling resistance BUT, the tires will wear out faster on the crown of the tread.
It would be interesting to have a temperature guage to see what the tire heat was after each run. It would be much warmer on the under inflated tires and that would lead to increased tread wear.
I believe this was just a test since most ppl will not air up in winter season.
"How much is it costing you in the winter "
with TPMS on most vehicles, I say 40% of drivers will freak out and hit up discount tire for a free air check or their local dealership to avoid being outside freezing.
Ii
I think they should stick a couple layers of bed sheets or something over the bed and see if it improves fuel economy
@@TheAnnoyingBoss
I believe the spoiler on the tailgate is supposed to help improve. that little plastic spoiler
on the other hand, I just brought a bed cover, and I didn't see no improvement on the MPG for RAM 1500 V8
the only way to gain more MPG is to drive slower. 55mph to 60mph.
if you don't like going that slow, 65mph will do it with no cruise control
i just did 55mph on the 22 MDX and i was getting 32mpg for 115 miles.
turn around and did 70mph it come down to 19mpg.
gotta drive slower for higher MPG, same goes for pulling trailers
GM's TPM sensors in their products (and I'm sure other brands) can read temperatures and pressures. In the Camaro and Corvette for example the DIC can show tire temperature in "cold", "normal", "hot", etc. You can see this with GM's latest TPM diagnostic tool as well on all their sensors (pressure and temperature). If you read the data in the vehicle with GM GDS2 diagnostics you can pull the actual temperature data that it is referencing.
So with a good OBD Scanner that can read the TPM data, and as long as it shows pressure AND temperature then you could read that data.
@FScott Gray And those higher temps is the leading cause of tire blow outs (more so then over inflated tires).
Should have done over inflated as well
How about a comparison between running at the maximum inflation pressure on the tire versus the recommended pressure on the vehicle?
now that you have underinflation data, perhaps you can over inflate them 15 or so pounds & do a comparison to see if you milage increases by a similar percentage.
Happy you guys are having so much success with the "Stubby" series. Here for it!
I thought it was decided shortbread 😬
That was interesting. I thought it would have made a bigger difference than 10%. Under inflated tires are costing efficiency for sure, but also they’d wear out a lot faster too.
I thak you for your comment! I know not to waste the extra minutes of my like wating til the end!! But, the 6 cylinder engine vs a mowr powerful engine?
I love the series and reviews of basic trucks. Sure the Hummer is awesome to look at but there's zero chance of me ever buying one. This series will inform my next truck purchase
18 IBS deflation seems a little much for the average person, maybe 5-10, my Wrangler changes only by 5 lbs in winter.
Totally agree that ~50% seems a bit more than a "slight" decrease in tire pressure. I'm surprised it was only a 10ish% decrease in fuel economy especially after seeing similar remarks about only a 10% decrease in tire pressure.
Im glad he made such a drastic deflation. It really shows if there was a difference and not margin of error type results.
What if you over inflated them.
I have 10 ply tires on my F150 that can take 80psi. The truck says 35psi. I keep them at 65 which I know is a harder ride.
I know that the military tells you to max out pressure on tires when you are in other countries. Supposedly it keeps the tires from coming off the rim if you hit potholes and other things.
This is proof that pickups can get decent fuel mileage, if the manufacturers would start streamlining the front to reduce drag, instead of making them look like a flat front beast! Are you listening Toyota?
Don’t Drive with LOW AIR Pressure…..FORD and Firestone taught us that…….they just went from 32 Psi that was recommended down to 27 psi…….Dont drive with 22 psi in your tires PLS…..your life may depend on it…🤔
I would have been interested to see what a 5-8 lb difference did. I think for safety sake you went too low on the tire pressure.
I wish you added 1 more loop with overinflated tires, say 55-60psi. Thanks for the video!
Probably not a good idea if it exceeds recommended psi. The tire can blow up.
Okay as long as not to exceed the max pressure written on the sidewall of the tire. I use that as my max and the door as min.
I thought the minimum grade gas for the V-6 was 87 Octane. You filled it with 85 Octane. Just curious.
85 octane acts like 87 octane at higher elevation due to lower air density
@@TFLtruck THANKS...I learned something new today!
Great test! Actually, before watching this I had actually checked my tires yesterday on all 4 of our vehicles- 2 Jeeps, a sequoia, and a crew cab Silverado, and all had gone down about 8lbs in the last 2 months because of the significant temperature drop we have seen in North Mississippi already. Nice to know the stats now 👍
1 psi per 10 degrees F drop in temp. Also maybe a tiny bit of loss over time.
I would also like to see with tires at maximum inflation pressure just to see if there is a small gain there. There should technically be a little less resistance at max inflation over standard inflation and it would be nice to see the result of that.
Not with radials. It puts more load on the engine at slower speeds. It also reduces traction.
Over or under, either way will lead to abnormal tire wear and shortened life of the tires, as well as increased wear on bearings and steering components.
@@pohldriver Right; and don’t forget the harder ride too!
Some people are so cheap
Should have run it at Max tire pressure as well to see what that does
Try riding a bike with low tire pressure. Then fill tires to specs and ride again. HUGE difference in effort. I think using a huge brick PU truck to show mileage change is less dramatic than a econobox car w/a small displacement engine. The higher mpg's you get normally, the more drop you'll notice w/low tire pressure.
I was expecting this test to be a realistic test such as what one would expect from average temperature drops due to season changes. This I would say would be around 5-7psi. Given that this was an extreme example, I am surprised the difference was less than 10%.
Haven't watched the video but simply having driven a bike with underinflated tires tells me all I need to know.
I would not have thought that it would have made that much difference in mileage also I would like to say it's nice to see you guys using a truck that the average Joe can afford instead of the 80-100,000 dollar truck
Why would u not think HALF the pressure would have an effect?! Please tell me u arent in charge of any vehicle maintenance.
@@crazyhass84 Good burn.
@@crazyhass84 It's not half the pressure. Please tell me you are not in charge of statistics.
Right!!
I have a question about your fuel choice. Your put 85 octane in a truck that has a minimum octane rating of 87. Why? And especially while it’s under warranty. Because that could void your warranty.
85 octane is fine at higher elevations, like where they are.
It wouldn't void their warranty unless there was a failure that was determined to be directly caused by the fuel (Magnusson-Moss Act)
would be interesting to see inflating tires slightly over the manufacture number, like 5psi or something to see if that did anything
@kingschill23
Might give you a little more MPGs and a tiny bit less tire wear, but you'll get more wear to your suspension components and rubber bushings too. Not to mention an uncomfortable ride.
I keep all my tires at 30psi for daily driving, we have bad roads where I live. However when I load up my truck or tow something heavy I will fill them all to 40psi.
The 10%is significant enough BUT the real concern is in the safety as you mentioned. An accident can cost you a lot more than 10%.........and maybe serious injury or death.
My only question is why do you fill up with 85 octane? I've always been under the impression that all fuel injected vehicles will suffer from it to include loss of power and gas mileage, since no fuel injected vehicle is factory tuned for it.
The higher elevation in Colorado causes 85 octane fuel to behave like 87 octane would at sea level. Its fine.
Any possibility that you could repeat the experiment but this time with higher tire pressure than recommend by the manufacturer? Great video.
Pretty much my experience as well... Loss of 2-3 MPG. Not huge but the cat definitely handles differently with low tire pressure. It's dangerous IMHO because if you drop below 20 PSI I think there is a real risk of the tire unseating from the bead, delamination, or rollover as you pointed out. I normally run my tires about 10 PSI below factory spec for comfort when I'm the only one driving. At about 15 PSI below factory I can start to feel vibration and know it's time to fill them up.
Makes sense that handling would be worse with underinflated rubber. I doubt that you would do the test with OVER-inflated tires, but if you had, I would have given this experiment more credence.
Thanks for the content.
Keep up the good work.
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just because it is a basic truck does not mean it has a basic engine the 3.6L has VCT on all 4 camshafts and an 11.3 to 1 compression ratio running 85 octane at any altitude will detune the engine
Incorrect. Its fine at Colorado.
I think it’s important to note that 85 octane is less than the manufacturers requirement. EPA needs to mandate the minimum octane rating 87 nationwide.
Altitude changes the actual detonation point, so to have the same across the board they lower the octane at high altitude areas. But if you drove downhill all the way in that 85 you would have issues or just poor performance.
@@alexmills1329 yep, people rarely tend to understand air density changes octane requirements.
I've ran a Z06 at altitude and it ran fine on 87-89 octane with no knocking. That same octane closer to sea level would knock pretty bad.
85 octane isn't available in locations closer to sea level and I can't think of a single vehicle with the OEM gas tank that could drive from Colorado to sea-level on a single tank of fuel, so its a non-issue. At a mile above sea-level (or substantially more in many places in Colorado), the air density is so low that the in-cylinder pressures are much lower, so 85 octane is totally fine.
To EVERYBODY: DO NOT DO THIS!!! When you drive underinflated tires, the tire sidewalls have to flex more during each rotation. This builds up substantial heat, which can then lead to a blowout. I'm speaking from experience. I ran underinflated in a car without TPMS and I knew i was doing it. What i didn't plan on was the complete sidewall blowout on the interstate and subsequent rescue by my parents. Keep your tires at the recommended inflation, please!!!!
The other big cost to factor in is the extra wear on the tyres, that will be massive
One psi change per 10 degrees Fahrenheit change (up and down accordingly), so check your pressures when winter sets it. And you should be checking pressures regularly anyway.
I have a 2014 Silverado four-wheel drive near Fully loaded 5.3 V8 Z71..
I get the same fuel mileage and even better I have averaged 25 mpg with the cruise control set at 74..
A 2014 Silverado WITH a V8 and 144,000 trouble free miles so far...
"Let's Find Out! | Ep.2 " TFL changes the Hummer EV Tire with the onboard jack and spare tire. And TFL uses the provided air compressor to see if it will do the job and how long it takes. Drive 62.5 miles on the 1st loop, call it 63 miles. Drive 61.7 miles and call it 63. Why not just call it 65 miles or 100 miles? Let's not be exact here. 🤣
Damn here in Albuquerque NM gas is less than 3 bucks a gallon.
Shhhh don’t let the secret out 🤫
Thank you for a real world test of something I have always wondered about!
I think the test you should do is : one(1) loop with +5psi from sticker , and one (1) loop with -5psi from sticker.
I own two(2) different Chrysler products with that 3.6, on both vehicules airing up to the prescribed psi door-jam sticker wears the tires in the middle and 'fast' , within a year the tires are done. So I run them 2psi lower in order to wear the tires evenly from one sidewall to the other.
You have good common sense! Hard to find! Haha. Small adjustments are fine, especially you are no hauling any weight generally. If in the same scenario you always has the vehicle full of occupants, especially adults, the you want to be closer to the maximum PSI to avoid wearing the shoulders first.
Nice comment.
I was wondering why on a ~4800 lbs. truck with a ~1500 lbs. payload they would recommend a 40 PSI tire pressure; that seems awfully high for a P-rated tire. Normally 1/2 ton trucks with factory P-rated tires take 35 - 38 PSI, depending on tire/wheel size and vehicle weight ratings.
@@voided3 Pickups come with quite a range of tire sizes. For example you can get the Ram 1500 classic with 17" wheels like the one they are driving or 20" wheels. The bigger wheels have bigger tires which will have a lower pressure. That is despite the fact that the trucks with the 20" wheels are heavier than the 17" wheel trucks due to more options on the trucks with larger wheels.
@@todddunn945 I can only speak for my F-150, but it has the same tire size (265/70r17) and the sticker recommends 35psi.
@@ALMX5DP Different truck. It all comes down to the weight of the truck. If your F150 is one of the newer ones with the aluminum body it could be quite a bit lighter than the equivalent Ram. That is why the manufacturer puts a tire pressure sticker on.
Inflate to the max air pressure marked on the tire and do the same loop.
risk a blowout, and cause an accident? i mean it would be good for youtube views
I always slightly overinflate my tires to allow for pressure drop due to cold. More air also should improve tire life.
More air will increase the balloon effect on the tire, placing more weight on the center of the tire, causing increased wear on the center of the tire. Slight over inflation of 3-5 psi probably isn't noticeable, but more than that may be. Trucks that often carry loads are difficult because a half ton of payload in the bed will, under ideal conditions, require more pressure in the tires.
@@mikecleveland823 cold air takes care of that
@@mikefoehr235 negative, inflating to the correct pressure takes care of that.
What in the google search kind of video is this. TFL Truck has to be under some kind of video contract with Sinclair because these videos are super low effort. What's next? Driving in 2x4 vs 4x4 fuel economy?
Im driving a 2500 ram. I need to put my tires back up to 80psi. The shop deflated it to 65 and 70psi and i never be able to get over 16mpg maybe 17mpg even on highway. In the past I was able to get about 19mpg in mountai s and 21 in mountains. Not sure if its only the tire pressure. Super annoying
Thank God the the US government requiring this ~$1000 dollar tech on new vehicles to save $9 dollars on fill-ups for those who can't buy a $5 pressure gauge.
Typical tire pressure change due to temp is 1 psi per 10 degrees change. If he was 42 psi first run then a normal summer to winter loss would only be about 8 psi. He dropped them over 20 psi. Heavily exaggerated results. I’m guessing that a 4% loss would be more accurate.
Besides the additional cost for fuel, think about the accelerated wear on the tires?
Underinflated tires run hotter which softens the rubber compound making for more abrasion of the tire.
I've seen under inflated tires on trailers wear much faster, and instead of getting 20,000 miles only went 12,000 miles before requiring replacement. I've also never seen a properly inflated tire blow out in hot weather.
12:45 you have no idea how many times I came off the trail and everybody wants to do 85 down the highway to get back to camp on like 18psi.
It’s not uncommon to lose air pressure with colder temps as air contracts. Probably not 10 percent but you will see a drop.
What you fail to mention is a solution where temperature don’t effect the air pressure. The answer is NITROGEN. It has bigger molecules than air so tougher to seep out, but temperatures don’t effect the pressure. That’s the main reason airplanes run nitrogen.
Food for thought.
Mpg Difference may not be huge but the wear on the tires will be over time.
I would like to have seen the results from a 30-32lb pressure, 22 is too extreme, nobody runs them that low. Door stickers are there to accommodate max loads which virtually nobody drives around with in their truck!
I like the video. However… that’s a pretty extreme case of low pressure isn’t it? You deflated them when they were warm too. You actually put those tires down to like 15-18 cold psi… depending on how cool it is there. I mean if your tires are normally properly inflated and then boom cold weather hits, I’ve never seen pressure go down that much. Where I live it’s normally like 3 to 5 psi. at the most. But then boom the weather goes back warm again and your pressure is right on the money. In my part of the country we go through cold days but it usually goes back and fourth till like late January. I drove into northern Michigan from Georgia on a trip with my pressure right leaving Georgia. Temps in Georgia were comfortable. I don’t remember the actual temp but I’m going to guess 50’s. Well the temps dropped to like 4 degrees overnight in Michigan. When I left out in the morning my pressure was only down 6 psi. I’d love if y’all did a more real world test now that you’ve got a base with the properly inflated tires. Maybe run the truck for a month with no more than 10psi low cold.
Nice video. However, since new cars/trucks have a low tire pressure indication, it would have been better if you stayed above that alarm point. This would show what mpg you could be losing if you don't pay attention. You showed how bad the mpg is when the vehicle has a low tire pressure alarm, but who drives that way?
Forget the mpg loss, at 50% inflation you're putting extra wear & tear on the tires so you'll have to replace them more often.
I'd worry if my inflation dropped as much as 10%.
True. There's more ways to lose money than buying more gas.
Well, I wouldn't forget the mpg loss as if regular gasoline ever comes about $4/gal again (and by golly I'm sure it will), it definitely makes a difference. Or, what about the diesel guys out there paying over $5/gal? Just saying, this is almost best-case scenario. Of course, yes, tires aren't cheap either -- especially guys running their A/T's and M/T's, so there's additional costs there as well.
@@DeltaSierra426 Gas definitely adds up, and the cost shouldn't be ignored, but with AWD or 4WD you need to replace the entire set of tires when replacing. That's $500 a pop, if you use cheap tires. It's pretty easy to spend upwards of a grand on a decent set of tires. That's a lot of fill ups plus you're driving on unsafe tires during that time.🤷♀
UNDERinflation is also bad for the tire's health. It can cause premature uneven bald spots.
Doubt people loose 50% of air just from not filling up at beginning of winter. Maybe loose 25%. Fuel mileage loss at 10% is considerable but safety at 50% capacity is a far greater worry.
42 would be too much pressure for my work trucks and 38psi would be just right for a balance of economy and safe road grip. On the other hand 22psi would cause the shoulders to overheat at highway speed, would squidge dangerously in bends and ultimately get a puncture due to shoulder damage where the tread meets the sidewall. Fine for low speed on sand for short periods only. I would never ever road a pickup at less than 28psi
@Usual Suspect Exterminator
Indeed. My trucks are rated to carry over one long ton and to tow 7700lbs and do recommend 38psi for this load. They are not Ram. They certainly do not recommend pressures anywhere near as low as 22psi on the door sticker.
I think the tires have a maximum pressure of 45psi moulded on them but that is to seat the beads when mounting a tire on to a rim.
@Usual Suspect Exterminator
I do not believe that to be correct.
@Usual Suspect Exterminator
Exceed 45 psi car and light truck tires when mounting and you run the very real risk of a massive explosion. The bead seating maximum is the same as the maximum recommended running pressure on this category of vehicle. Heavy duty trucks of course can run at 90psi or higher. Different category of vehicle altogether.
I have been responsible for the health and safety policies and monitoring of a fleet of vehicles.
Have you guys ever talked about how Ford recommends top tier gasoline? I'm sure it's not a huge deal but I usually try to find top tier gas stations for my f-150.
You dropped the psi by almost one half. Of course you’re going to see mpg go down. More interesting would be to see the mpg with only a drop in psi of 5 to 10 lbs. I suspect most people drive around with their tires slightly under inflated. Not severely under inflated.
Other things that affect MPG are winter fuel vs. summer fuel, traction tires vs. highway tires, mud flaps, lifts etc. If you can find non ethenol fuel you will get better MPG also.
I have used non ethanol fuel and it did get much better mileage and felt like more power in my 2.5 Subaru Forester
@@usualsuspectexterminator Spoken like an Iowa corn farmer.
@Usual Suspect Exterminator I believe you are mistaken. Plenty of tests and forums out there showing ethanol does effect mpg's by as much as 10%. In my experiences it was a 10% drop using gas with ethanol.
@@usualsuspectexterminator Correction, a really dumb Iowa corn farmer.
Honestly, if you’re gonna get a vehicle that will have no sentimental value attached or that you don’t love ,then don’t buy new. You can get this exact truck with the exact specs, three or four years older for easily 15 grand cheaper.
Alright so 18psi difference in underinflated tires.. what about +18psi to over inflates tires? Do a run at 40psi vs 58psi lol
That sounds about right. I studied this on my 100 mile commute and found you could change it 5-10%, depending how much more or less air pressure I had.
Worn out tires also help, but it was 5% at best
Worn tires may show that you traveled farther than you actually did because they cover less ground per revolution due to less tire height which slightly changes gear ratio.
@@thomastessin1663 100% lol
tyre temps are the big issues when running underinflated. too much heat and the carcass can fail or simply blow out. apart from excessively old, dry rotted/cracked tyres, under inflation is probably the biggest cause of 'no damage' tyre failures/blowouts where i live, and probably worldwide. ('no damage' being tyre failures that havent been caused by a rock, piece of metal etc being at least part of the cause of failure)
The back tires likely started over-inflated, since there's no way the truck has a 50/50 weight distribution. Watching the tread contact is the only way to really know what the correct pressure is. The easy method uses chalk across the tread and watch where the chalk is removed when driving in a straight line. You can sometimes see this pattern with dusty roads as well. Ideally, the chalk line should be complete removed across the tread. If it remains on the outer blocks, the tire is over inflated and will wear the center of the tire too quickly. Under inflated will leave the chalk in the center of the tread.
You can inflate/deflate the tires to find the pressure for these two points, then adjust from there. The best fuel economy will have the most pressure in the tires, while the best balance will be toward the middle of the two bands, and is also a good point for winter tire traction.
That only really applies to trucks, and even then, mostly HD trucks that run a lot of tire pressure. You might be able to take 5psi max out of the rear tires of this 1/2 ton truck, but then are you going to add it back in every time you put something in the bed or tow something?
@@ouch1011 it works on cars as well, especially hot rods.
Nice experiment! I always check my tires every two weeks. Obviously tire pressure also affects ride/handling.
The general rule of pressure is 1psi = 10 lbs of spring rate. This is why in racing, crew chiefs will make air pressure adjustments even by 1/2 lb.
Running at half the proper air pressure is not slightly less. This was pretty much a waste of time, since most people will never run long distances at that low of pressure in all their tires.
When we run low psi off road at the dunes or off road parks there are air fill up stations at the entrance and if not we always bring a portable compressor. A real world test would have been at 4-5 psi less not 20 in all the tires or just one extremely low like a rear which is much more difficult to recognize since there is less weight on those tires.
If you've ever ridden a bicycle with low air pressure in the tires, then you know how hard it is to ride. Then you pumped them up to proper pressure, and the bike rolled so easy and it was much easier to pedal and the bike was much faster.
Hey guys wonderful video is it possible you guys Can do it with over inflated tires to I want to see what happens then to. Like if people went to see this to PIN comment please thanks
Dang these prices are still crazy here in Central Texas I just saw $2.439 a gallon for 87
This test should have been done on a more aerodynamic vehicle. Like a Sedan or at least a small crossover. I bet it would be a much bigger difference.
Small differences in vehicle setup and driving technique can make huge differences at the pump. I started keeping a eye on the current efficiency bar for a few tanks. It barely made a difference on my speed at all but added 80-120 kms to each tank.
Yes, keeping RPMs low and not downshifting unless you absolutely need to, helps with efficiency. Coasting wherever possible also helps a little. What other techniques can you add to this list?
@@clutch7366 I would add being light on the throttle. Obviously one should keep up with traffic, but not flooring it makes a big difference. Also just generally try to hold a reasonably consistent speed as traffic allows. As Kevin said just general awareness of driving habits makes a big difference to overall efficiency
@@clutch7366 Avoiding unnecessary braking and excessive speed are the two main things that will help efficiency. Accelerating slowly doesn't help much, since the energy required for a given increase in speed is the same whether you achieve that increase quickly or slowly.
Heavy footed acceleration probably leads to a higher enrichment ratio.
@@johnhoover7869 True.
I've been checking this for decades, and I've found that 36-psi cold -- in the morning without the sun hitting the tires -- is the best compromise for mileage vs comfort.
That is not a general number and depends highly on the vehicle.
Best number is what the manufacturer recommends.
@@ouch1011 -- Not always: the low recommended tire pressure for the ford explorer helped cause the roll overs; often times the recommended psi is about cushy ride comfort, not what's best for economy and traction. -- or in the explorer's case, safety,
Now I want to see that exact same test repeated with that same truck on that same loop with the tires aired to 45 PSI and see if you can score 24 MPG on the loop!
I am surprised Lil Stubby is not getting even better economy. Once that pentastar breaks in I hope you get even better economy.
I drive to work in the middle of the night before the plows clean up the roads, talk about poor fuel economy.
Is it just me or does Sinclair fuel burn up really fast. Go through a whole tank like nothing
A more important consideration when running on underinflated tires is safety. The tires will get hotter which can lead to things like tread separation or sidewall failure. This leaves the possibility of being stranded or having an accident. The best thing, check your tire pressure regularly. You will save money and be safer.
Exactly right. This was the cause of the Ford Explorer / Firestone tire failures and subsequent rollovers back in the late 1990’s. Ford recommended only 26 psi at the time.
Hahahaha
@TheMrDudiness hahaha good one
As long as the load range is higher than the factory tire that was on the vehicle I don’t see a problem my 98 5.9 1/2t with a slightly oversized tire at a 265/75r16 vs 245/75r16 I get about epa level I run about 25psi in California these tires are load range d I have 37’s and a leveling kit that will be installed so I think it’ll make a sizable difference in efficiency and mileage
Next time try +4psi over inflated and see...could be interesting. Cheers!
Single cabs are so tiny now, my 2003 ram short bed had a nearly a foot behind the seats, and more headroom as well..
How much will it cost to replace the tires once the edges have completely worn out prematurely long before the middle thread area? The manufacturer's recommended tire pressure takes into account the weight of the vehicle and how much air is required to keep the tires properly flat on the road for perfect thread wear.
I think lower pressure also caused error on your odometer. But I'm surprised why it shows less miles. It should have shown more since the tires radios decreased.
Interesting point. Static the radius did decrease but when rolling at speed I’d think the difference would be minimal, not to mention there’d still be the same tread circumference needing to make contact with the ground. But yeah would be neat to hear scientifically how that works out for different speeds or scenarios.
Not only will you get more MPG's with properly inflated tires you will also get a longer tread life out of your tires as well, a definite win win.
in the summer i run about 40-37 psi, in the winter i run 33-30 psi. i care about grip more than mpg during the snowy months.
Glad to see the mpg improved since they brought it home. Great video Andre
I have a 1995 4Runner with a 22RE. It makes 110 hp on a good day. Plus I am at 6500' so its really making like 88 hp here if I am lucky. Basically, barely enough power to actually go the speed limit.
I can feel a pretty noticeable difference between 30 psi, and 20 psi when I am driving home after being air'd down on the trail. The engine is weak enough where it makes the difference between me having to downshift on hill that I wouldn't normally, or simply can't hold speed at all. So yes, it matters.
Good video bad truck
Not only will you have a 10% loss in fuel, you also wear your tires quicker $$$, and increased drivetrain wear. Don't forget that's the only thing touching the ground! Tires are very important!
What kills fuel economy is speed having you're tires a few psi off is okay
So go slower and get better gas , makes sense ,just don't go highway speeds to save fuel
I would like to have seen the comparison of underinflated, truck recommended pressure, and tire max cold pressure.
Agreed, the sticker on my 2020 Ranger states 30psi and on the tire it states 51 max psi
Me to
I just did this today, (fill up my tires) I’m wearing out my 35” tires faster than I’d like. I’m running 36 psi
With a Gm 3500HD (diesel w/ 10 speed) Denali the best I've seen is 10.2L/ 100Km - roughly 23MPG. Its interesting to see the smaller motor and lighter truck do almost exactly the same.
Thanks for the Video!
Andrea would there be any interest in doing a loop with the tires topped off to their max pressure for the tire manufacturer?
I had a 2017 Ram 3500 with a 6.7 Cummins diesel single rear wheel....a couple times with the cruise control set to 70 mph My average fuel economy hit 30 mpg hyw, summer fuel 70 deg day 110 mile trip to my other property....
Best I ever did, I normally drive faster, it seemed to be an enomenally, I would normally average in the low twenties with faster and harder driving....
Diesels have better thermal efficiency/fuel economy than gasoline (and worse tailpipe emissions).
The 3.6 is also not an especially efficient engine.
37 for single cab 4x4 truck is not very offordable
Save 16 minutes of your life by skipping to 15:57.
Thats better mileage than my Outback Wilderness lol
Please do a overinflated test! I always increase psi on road trips when the weather is decent, even if only by 10%. Let me add that I never go over the rated pressure on the tire all you haters. Lol boys…
Don’t over inflate tires. It’s not safe and would always be deliberate. Hard to deal with if a tire fails and you have an accident as a result. Under inflated tires can be accidental. You will save maybe 2% maximum. The numbers here were excessively low to show that there IS a difference.
@Usual Suspect Exterminator - The idiots are coming out of the woodwork. You included. Now grow up.
Why? 🧐🙏🍀
@@shitloveaduck I’ve had good results
Overinflation will cause the vehicle to lose its stability. It's UNSAFE!
This isn’t realistic at all it should have been around 5-7 psi lower . Cold temps are not going to drop the tire pressure by 18 psi get out of here with that garbage. If it did then you have a leak problem not a cold weather problem. This is such a good idea for a video but was executed terribly with these exaggerated tire pressures
Agreed. And if the pressure was 18 psi lower, it would likely be in just ONE tire, due to a leak, and not all four tires.
I wouldn't have taken 20 PSI out of the tires. That definitely seems extreme. I'd say 10psi lower is more realistic
👆Thanks for watching
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Even on my bicycle, riding on 120psi is a lot smoother than on say 80-90psi. Rolling resistance is less, but also is traction so you need to be careful not to cause tyre slip.
Who runs bicycle tires at 80-90psi? Nobody.
@@WheresHerb Road bikes are over 100psi. Mountain bikes 25-30.