I have often heard that the motor oils used in racing cars are often different than what motor oil name might appear on the outside of the car. What motor oils are popular in racing cars of all types-Top Fuel, gasoline drag racer, CART, Indy Racing, Nascar, Winston Cup, etc.? The motor oils I have heard are often used in racing include Redline, Amsoil, Torco, Mobil 1, Royal Purple, etc. These are the motor oils that I have heard are used, but I don't know for sure. I have even heard that sometimes at major racing events, a company will formulate an oil for a racing car just for that event.