@@baljeetseggzy7746 the rear does not due to being a locking rear differential. I also know the front requires the same Motorcraft 75w85 hypoid gear oil. So, as long as you buy Motorcraft 75w/85 hypoid gear oil, you are “Ford approved”
@baljeetseggzy7746 I’m sure you can, as I have ran full synthetic motor oil form 0w/20 to 5w/30 in my Ford trucks of all engines when the recommendation was 5w/20 and I’ve never had an engine issue but I do change oil within 4K ever time so I’m sure the extra warm rate viscosity won’t blow anything sky high👍🏽
@@kineticenergy1085 i run 5w-30 motorcraft in my 18 5.0 and haven't had issues (3 years using so far). my local ford dealer wants about $40 a quart for the 75w-85 but 75w-90 is half that. i haven't seen anything about adding modifier but i thought i would ask. Valvoline sells some oil with the flex bag style container and it says it has additive for a limited slip diff. very confusing but probably should just run OE fluid
@@baljeetseggzy7746 ya, one thing I do know about the locking diff and LSD is that the LSD does need friction modifier and the locking diff does not .i also have the 2018 5.0 with the rear locker, FX4, and 10r80 trans. I’ve done all rear, front (well, you see how but also see why I didn’t need to change fluid) transfer case, engine oil, and my latest is the DIY drain and fill of trans fluid about 2 weeks ago.
Thanks for this. I’m going to do this along with the transfer case fluid after I change out the trans filter and fluid.
Right on😎👍🏽
do these differentials need friction modifier?
@@baljeetseggzy7746 the rear does not due to being a locking rear differential. I also know the front requires the same Motorcraft 75w85 hypoid gear oil. So, as long as you buy Motorcraft 75w/85 hypoid gear oil, you are “Ford approved”
@@kineticenergy1085 nice, ive seen online people say you can run 75W/90 since 85 is super expensive and rare.
@baljeetseggzy7746 I’m sure you can, as I have ran full synthetic motor oil form 0w/20 to 5w/30 in my Ford trucks of all engines when the recommendation was 5w/20 and I’ve never had an engine issue but I do change oil within 4K ever time so I’m sure the extra warm rate viscosity won’t blow anything sky high👍🏽
@@kineticenergy1085 i run 5w-30 motorcraft in my 18 5.0 and haven't had issues (3 years using so far). my local ford dealer wants about $40 a quart for the 75w-85 but 75w-90 is half that. i haven't seen anything about adding modifier but i thought i would ask. Valvoline sells some oil with the flex bag style container and it says it has additive for a limited slip diff. very confusing but probably should just run OE fluid
@@baljeetseggzy7746 ya, one thing I do know about the locking diff and LSD is that the LSD does need friction modifier and the locking diff does not .i also have the 2018 5.0 with the rear locker, FX4, and 10r80 trans. I’ve done all rear, front (well, you see how but also see why I didn’t need to change fluid) transfer case, engine oil, and my latest is the DIY drain and fill of trans fluid about 2 weeks ago.