VR1 Full Synthetic is formulated with high levels of ZDDP (zinc dialkyldithiophosphate), combining phosphorus and 2X more zinc for superior film strength and extreme anti-wear protection on pistons, cams, and bearings | Compatible with gasoline and partial alcohol fuels in track and street service | Enhanced anti-foaming agents and maximum resistance to thermal breakdown help safeguard high-compression motors from extreme stress and engine failure | Features friction modifiers to boost horsepower and minimize heat for peak performance under pressure | Valvoline VR1 Racing Motor Oil is the original motorsports and muscle car engine oil with a proven track record since 1965 | Meets or exceeds all requirements of: API SL and all preceding API gasoline categories. High zinc formula. May not be suitable for certain emissions systems