What fluid do you guys like to use for the rear differential service?
I've always used the Mobil 1 as it's cheap ($10) and available everywhere.
link: https://youtu.be/VoZOvgP6Pag
Redline 75W90 for non-limited slip differentials. Period. You’ll need exactly a quart. Remove the fill plug before you drain the fluid. Why? Let’s say you drain the fluid and can’t get the fill plug out. Ooooops.
I've been putting M1 in mine for years. It weeps fluid from a few places so it needs a couple ounces ever couple months
M1 75w90 here in my BMW and Mercedes. No issues. Ever
For our BMW, Castrol products or OEM. I've never had good luck with M1 products with our BMW's.
Regards
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