alright guys...just kinda posting this up for informational purposes. i normally use Mobil1 15w50, because its a little thicker so it helps with the rear main seal leak. i found out over the winter, that 15w50 is a little too thick, lol. i just got done changing my oil and i tried something new...i bought Mobil1 10w40 High Mileage...idk if its because its High Mileage or what. but, this stuff is crazy thin! which may be bad news for my rear main seal (gonna change it when i change my clutch) hopefully i dont lose oil a lot faster...but this is just for everyone to know about.