In Reply to: I'm not doubting that it is better but... posted by Jon on April 25, 2001 at 16:21:17:
I run redline in my SCCA ITB 1972 2002 race car. I have run Mobil1 and Castrol. Under race conditions, over three years, I have observed the differance in oil temp as shown by my mecanical guage. Mobil1 runs 10 -15 hotter then Castrol which runs 5-10 degrees hotter then Redline (~200 - 210). If you work in the garages of a major race (dayton42 sebring etc) you will find most of the teams are indenpendant, as opposed to BMW, Audi, etc. Most of these teams use redline in their engiens, diffs and trannies. This is from thousands of hours of collective experiance, as shown in tear downs after a race, series, season. After a team has ripped down a hundred engines, you will see if an oil makes a differance, and it does. One can learn from collective experiance, or one can learn from spun bearings.