Oil Filter Comparison 2 - RCM, JDM STI, Cusco, HKS, Greddy
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- Опубліковано 29 вер 2024
- For our second Subaru Oil Filter Comparison, we take a look at the JDM STI Oil Filter, Cusco Oil Filter, Greddy Oil Filter, and HKS Oil Filter. We break them down and compare their design, filter material, and relief valve spring to the OE filters that we have already tested as well as the Roger Clark Race Oil Filter.
After our first oil filter video, we got a lot of questions about how these high end filters would compare and honestly, we were as curious as you were.
Our findings in this group were actually surprising. There is actually more variance in this group than we expected, and some of those differences that we found pushed us to think about filter design, and what makes a good filter.
Does an oil filter that works well on a Street Car also work well on a Race Car?
If you are interested in any of the filters that we look at in this video, they are all available on our website here:
www.flatironst...
Thank you for watching and Stay Tuned!
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Awesome stuff! Supposedly the Cusco filter has a magnetic filtration system built in. Did you find that tech in there and Do any of the other filters offer similar?
Thanks for your question. Yes, the Cusco and HKS filters both have a magnet in the filter. I think that it is a nice feature, but it isn't a game changer in and of itself.
The magnet can make more of a difference in pan than the filter, but it is certainly better to grab those particles before they make their way into the engine.
Thanks for watching and Stay Tuned!
Test & show us the results. Looking at the parts is not enough.
Which one HKS and Greddy the good oil filter for subaru your rekomended
Of all of these filters, we would still recommend the RCM oil filter.
Thanks for watching and Stay Tuned!
What are your thoughts on Wix filters?
Thanks for your question. I don't have any experience with them specifically. I know that they make some of the aftermarket filters out there as well as their own, and I'm sure they are decent filters.
We may explore them at some point, but it isn't something that we are working on at this time.
Thanks for watching and Stay Tuned!
Maybe next could be Wix XP and K&N? Great video we don’t hear much about the JDM options like Cusco, HKS, etc
Thanks very much for the comment and thanks for watching.
Stay Tuned!
Thank you for including HKS, don’t know if you did it due to my comment or not. I have been using them for few years on my STI because they are locally available for reasonable price.
Absolutely! It is definitely an interesting filter. Thanks for the suggestion!
Stay Tuned!
a new oil filter 15208AA21A is replacing 15208AA20A. Wondering if you were able to check t see if there are any improvements?
Wix racing filters no bypass only choice should be considered, of course don't leave them on forever without bypass change regularly..
This was some really great info. Especially nice to know that the "performance" jdm filters are actually legit and do offer benefits. Our Imprezas all have the RCM filters from you guys on right now, and will probably be sticking with them. Not going to lie though, I'd love to look under the engine and see the STi filter there 🤣🤣🤣 #oemplus
Thanks very much! Really appreciate it and glad that the video was helpful!
Stay Tuned!
What is the micron ratings difference on all the brands?
Love learning about nuanced car topics, thanks! What’s your thoughts on the JDM oil company ZERO Sports? They advertise their oil and filters to be specifically designed to meet the challenging oiling environment of a boxer engine.
I am able to purchase their filters here in the States but not sure if anyone imports their oil?
I bought a Setrab high flow "forever" filter. You clean it and re-use it (after full engine break-in). I hesitate now because it is 30 micron. Haven't done first startup yet. Break-in will be on blue Subie filters. Thoughts/experiences with the "forever" filters?
Good stuff and glad you’re putting this content out there.
Have you considered doing a comparison to the more common off the shelf filters from parts stores? Mobil1, STP XL, K&N and Royal Purple?
Would you consider it in those were to get sent to you?
Thanks for watching and thanks for the suggestion. Right now, I don't think that we will be looking at those filters, but if anything changes, I'll let you know.
Stay Tuned!
Great tech. tip! Much appreciated Flatiron.
Thanks very much!
Thanks for watching and Stay Tuned!
When this video came out, I watched it, and gave a technical response - there was no bias of mine present.
That comment was deleted. I thought it was a mistake, so I checked later. Nope, my comment was deleted.
So, last I recall, I re-posted the short version.
Yup, that was deleted too.
I had planned to buy the Fluidampr (and other items as needed) through Flatirons Tuning, but you've not only lost me as a subscriber, but also a customer. All because I posted a reply regarding ISO testing & results on oil filters - a test that none of the oil filters shown have gone through.
Although, at this point, I expect that this comment will be deleted as well.
I do apologize, but to the best of my knowledge we didn't do anything to any of your comments. I looked back at the history on this video and I don't see any other comments from you on this video so I'm not sure what happened.
You are certainly welcome to post any kind of technical information on our videos as that just helps everyone involved.
Thanks!
@@FlatironsTuning I do appreciate your response. It is likely that my response above was over the top, and do not believe that you are misrepresenting your words or observations (ie. you never deleted any post).
I will skip to the heart of my original replies.
ISO test 4548 is the method used to determine the efficiency of filtering media. I would never use/suggest any oil filter that has not gone through this evaluation, as you truly have no idea how efficiently it is protecting your engine.
I was unable to find results of this test for Subaru, Cusco, Greddy or HKS. I'm not saying they do not exist, they might. I am saying unless a filter has test results you can read for yourself, I would never install one of those on my car(s) or suggest it to a friend or family member.
The link below goes into a lot of detail, and you can pay for this service to be done - without having to rely upon a big company to do this.
bobistheoilguy (dot) com /forums/threads/would-you-all-like-to-see-iso-4548-12-oil-filter-lab-testing-comparison-efficiency-capacity-pressure-vs-flow-bubble-point-and-burst.334882/page-19
spring pressure is only one part of the equation.
If the valve seat is larger, it will take more spring pressure to maintain the same relief pressure.
To put it another way, (valve area x target oil pressure relief setpoint) = lb force of the spring.
You can't just measure the spring without knowing valve area.
Thanks for the comment Dom, and good point for sure. In the case of all of these filters, the valve size is very close, but I'll have to measure them to be sure.
I do think that the difference that we measured in the spring pressures does show a difference in build principals, but there are a lot of variables there as well. There is a human error element in measuring the point where the valve opens for instance too.
Thanks again for the information and thanks for watching!
Thanks for taking the time to do this,i buy my filters from flatirons as it is,Roki here,RCM would be my second choice,awesome info and content
Thanks very much, and we really appreciate the support.
Stay Tuned!
Great info, thanks. I change my oil after every track day, which can sometimes mean changing it every week when the autocross and club racing seasons are overlapping during the Summer. I use the black “JDM” OEM Subaru filters since they’re $7.50/each when I buy a 10-pack. I’ve noticed the cherry-color STI filters on the Subaru motorsports cars (the NUR 24 cars, Group N competition cars, etc.) so I’d prefer to use those. I can’t justify $60 per filter/$1000 per year in oil filters though!
After watching this video, I’m very interested in that lower bypass pressure on the track. I appreciate your testing and explanation.
I’m going to switch to the HKS/Greddy/Cusco filters for track use if I can find bulk packs that get them closer to $20 per filter.
Thanks for your comment. I would recommend trying the RCM filters. We have them for $46 for a 3 pack:
www.flatironstuning.com/rcm-race-oil-filter-special
We have had great luck with them on our Race Cars so far.
The HKS will be the next one that we do some testing with on the car I think.
Thanks for watching and Stay Tuned!
Kind of curious where are you getting the jtm filters for $7.50 a piece in a 10 pack I've been looking and cannot find any for that price.
@@tommykrutz3436 the parts department at my local dealership
Try Mann, Purolator, Mobel1
How does the pressure release valve in the oil pump and the relief valve in the oil filter relate to each other ? Does one open before the other ? Or maybe dumb question.
Thanks for your question, and not a dumb question at all.
They are actually un-related.
The oil pump pressure valve controls the maximum pressure that the oil pump will put out (in most cases. Not cold start for instance). Generally that pressure is about 85 psi. That means that when the oil pump gets to the point where it is sending oil into the engine at 85 psi, the relief valve will start to open if pressure increases to ensure that the oil pressure in the engine doesn't continue to build.
In the oil filter, the relief valve sits between the filter media and the path into the engine. A 23 psi oil filter relief valve would open when the pressure of the oil that is coming into the filter and waiting to get through the media is 23 psi higher than the oil pressure on the other side of the filter that is headed into the engine. So in the case of the oil filter, the relief valve is making sure that the pressure pushing through the filter isn't too great to the point where it could damage the filter and/or to make sure that the restriction of the filter (think of a higher mileage filter that has caught a lot of stuff) isn't preventing too much oil pressure from actually getting into the engine to help the engine work.
Hopefully my explanations here make sense.
Thanks for watching and Stay Tuned!
Newbie here. Proud ej255 owner. I love your content. I heard something that auto parts store filters, in general, don't have the right kind of relief valve spring, and they bypass sooner rather than filter? Is this true? Your graph readouts indicate this as true.
Thanks for your question. At this point, I wouldn't say that we have run into an aftermarket filter that says it will work for an application, but it is not built to the correct parameters. I will say that we aren't actively looking for this either though. In the group of filters that we are looking at currently, we may do a bit more testing on the filters, but I am not sure what we would do next at this time.
We will just have to see what else we can come up with.
Thanks for watching and Stay Tuned!
Well done. Thanks. I agree, HKS design = max flow.
Thanks for watching and Stay Tuned!
Thanks for doing this!
Absolutely! Thanks for watching and Stay Tuned!
I'd be curious to see Wix 57712, my go to filter, or 57712 XP which has synthetic media. Supposed to be some of the best filters and are very inexpensive, around 5 and 8 dollars.
I run the wix also
great conent , i've been using tokiroki more than 5 years on my ej20 grb sti.
Excellent! Glad they are working well for you.
Thanks for watching and Stay Tuned!
Would love to try these filters. Especially RCM but it seems for second gen BRZ (FA24) it’s HKS or OEM or nothing 😢
What’s your opinion about the Greddy oil filters? Thank you very much
GReddy has an oil filter for my Honda what are your thoughts on using it for a daily driver ? Do you think the bypass pressure is too low and I should use something else ?
Lots of details. Muy bueno. I use a denso oil filter
Thanks very much and thanks for watching.
Stay Tuned!
I used Fram Tough Guard on my turbo 2.5 for 165k miles and it worked great.
Awesome information, thanks!
Absolutely! Thanks for watching and Stay Tuned!
@@FlatironsTuning Yes I will.