I like that analogy.quote:
Originally posted by TEXDOG:
oil is like pizza, you want it thick or thin or just right.
I happen to be an Amsoil man. Can't argue with M1 or GC though. Redline seems to be a great race oil but not so hot on the street based on the uoa's I've seen. I don't know much about the others.
Someone said there were little UOA reports got GC. I am under the impression that BMW labeled oil is GC. Am I wrong? There are some BMW oil reports around plus I have seen a few GC reports here as well. It is a good oil.
Finally someone mentioned the E-46 M3 engine. The E39 M5 engine has the same requirment for Castrol 10W60. Keep in mind BMW "M" engines have always been streetable race engines. They are not like most everyday drivers and BMW expects people to pound the p*ss out of them on the track. As such, owners should use the oil the recommend.
My $0.02,
Don