[TexasZed4MC]

I use Redline 10w60 in my M Coupe. The engine runs quieter with it. I started using Redline about 4 years ago when I had my E30 M3. If you know much about those cars you realize the S14 engine in them are know for spinning main bearings. I never had one hiccup using Redline even after spending $7,000 rebuilding the engine to 2.5 EVO specs. The S14 engine was part of the first two M engine. Even Classic BMW of Dallas uses Redline in the motorsport race teams engines. Their Race team director told me that their dealership does not send oil out to be analyzed, with any warranty issue. There is NOTHING wrong with Castrol oil, I just know my faith in Redline and how good that oil is. Thats even after 2 dozen track days and many autocross' and daily drive E30 M3 miles.