Originally Posted By: Mr Nice
What brand tires on your M3, how often you drain/refill ATF ?
I've always loved BMW interiors, very functional and sporty/elegant.
Michelin Pilot Super Sport. 255/35R19 up front, 275/35R19 in back.
The car has a dual-clutch transmission (same Getrag unit that Ferrari uses) so the fluid is technically "lifetime". I opted to change it out for Motul Multi DCTF at around 50,000 miles; UOA came back very good so I suspect I could've left it in there for another 25,000.
The DCT fluids are similar to a 75w85 GL4, if you're wondering. It is, mechanically speaking, very similar to a manual transmission -- hence the psuedo-MTF.