This oil quite likely has the lowest coefficient of friction available in an formulated oil for a racing gasoline engine . That info is hard to come by though so don't hold me to the fire on this . I'd like to know the results of ASTM D4172 testing of some other oils . Brock Davidson of Motorcycle Drag Racing fame reports he has used this oil in a modified Suzuki Hayabusa for over 200 dyno pulls and various other activities . This stuff is light ! http://www.aerospacelubricants.com/catalogue/pdf/Prodri~1.pdf They have 0/20 - 10/30 - 15/40 - and 20/50 available as well but little data on these . Pricing seems about 4 bucks more a gallon than Delvac 1 . Now , who here can use an oil of this type ?