Extreme V-Twin Oil Synthetic Plus 20W-50 is a sophisticated engine oil designed to meet the demands of V-Twin, air-cooled and high performance engines (non-metallic clutches). Schaeffer's Extreme V-Twin Oil is engineered with severely hydro treated PAO synthetic base oils, severely raffinate hydro converted Group II Plus, a proprietary additive package, proven friction modifiers Micron Moly and Penetro and a viscosity index improver. Blended with extra zinc, Schaeffer's Extreme V-Twin Oil protects critical engine parts from wear. Schaeffer's Extreme V-Twin Oil helps keep engines exceptionally clean and protects against rust and corrosion.Meets Harley-Davidson V-Twin specifications and JASO (T903) MA-2. Not recommended for 4-cycle, ATV or motorcycle engines specifying a JASO MA or MB, NMMA FC or FC-W 4-cycle oils.