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Originally Posted by tomp
http://www.elcovaforums.com/forums/s...&highlight=oil
Notice how it mentions Redline is a class 5 oil compared to AMS & Mobil1 which are class 3. Apprently this other rating means it can withstand extreme temps better. Might Be good to try it with your heat concerns.
It explains why it has outperformed every other fluid I have used in my air-cooled Harley. It runs very high temps, due to compression, timing etc. (120/120 hp/tq).
Sounds like I will definitely be using Redline in my TC & diffs 
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Mobil 1 and Amsoil ASL are group IV, not group III. This information on Redline is for engine oil, and yes, Redline is well designed for air cooled engines which tend to burn hotter than liquid cooled engines.