Hi, reconranger, We used to race a Nissan Skyline Turbo and were very interested in using the best oil we could find. The best information I found was writted on "www.skylineowners.com" by a guy called "oilman" He talks all the common oils including Elf F1 oils which by the nature of F1 have to be good oils. Anybody interested can do an advanced search on that forum and search by author and find some very informative stuff on oil. Nodoubt oils used in NASCAR and Indy racing must be good too.