Good read regarding oil in general
http://www.superchevy.com/how-to/add...en-racing-oil/
There's been a lot of debate on oil viscosity, temps and whatnot. Something perticular that I've been trying to do a lot of research on is oil temp. Here's a few quotes from the article that stood out for me...
"All oils gets thinner as they get hotter, but oil can protect an engine beyond 300 degrees as long as the viscosity does not drop too low from the heat. The real question is: For how long can oil protect an engine at elevated temperatures? For roughly every 20-degree increase in oil temperature, oil's useful life is cut in half, so for the sake of oil longevity, you want to keep oil temperature under control."
"It is important to realize that above 320 degrees your engine bearings will not be happy, as the bearing alloys do not like temps that high. Keeping your oil temp in the 220-degree range helps extend the life of your engine parts as well as the oil. Never forget that oil does about 40 percent of the cooling in your engine."
"One of the issues with engines that run at wide-open throttle continuously is heat, and these low viscosity oils actually help to reduce heat generation. High viscosity oils generate more heat as they are pumped through an engine, so using a lighter oil helps to prevent excessive temperatures."