Pennzoil 25W-50 Racing Oil, GT Performance Oil &ndash; 1 Quart (Case of 12) Pennzoil 25W-50 Racing Oil is formulated for four-cycle racing engines such as dragsters, motorcycles, Indy cars, diesel trucks Pennzoil GT performance racing oil is designed for the lubrication of high-performance competition engines Fortified with superior additives and oils that resist breakdown under the high loads, temperatures, and speeds of fast revving engines Pennzoil racing oil protects cylinder walls, pistons, bearings and valve train components Compatible with a variety of competition fuels, including gasoline, methanol, nitromethane and diesel fuels