Consistent wear and operation in drag racing classes like Stock and Super Stock (many switch to 5WT for Class Racing) Popular for qualifying in stock car engines Used by many top engine builders in Spec Miata and other low-power road race engines Provides more power and better wear in Four-Cycle karting engines like Yamaha/Burris F200, Briggs Animal and World Formula, Honda GX 160 and GX 200, Kohler, Techmseh and Clones SAE Viscosity Grade 5W20