Lucas Synthetic SAE 20W-50 is a formulation of only the finest synthetic base oils plus an exclusive additive package that includes lubricity agents and anti-seize agents that control drag like a zero weight oil and protect like a heavy multi-viscosity oil. It?s the perfect non-foaming lubricant for high RPM performance engines, including motorcycle engines. It?s also excellent for normal highway use. Very long lasting. Lucas Synthetic SAE 20W-50 is the perfect lubricant for low temperatures or extreme high temperatures and blends with other synthetic or regular motor oil. Blend a quart or two into your conventional motor oil for easier starting and longer oil life. Meets or exceeds all manufacturers specifications for SAE 20W-50 and API SL. Exceeds American and European OEM specifications. Exceeds performanceblevels of API SM/SL/SJ/CF, ACEA A3-98, B3-98, B4-98, VW 500/502/505, Daimler Chrysler 229.1 and BMW Longlife Oil. This excellent product provides the consistent viscosity needed for precision ET racing. It also stands up to heat and fuel dilution for the longevity required by circle track and off-road racers.