Lucas Semi Synthetic Oil is a blend of high quality base stocks and an exclusive high performance additive package that ensures minimum drag, extended engine life, longer oil life and easy cold weather starting. The perfect lubricant for both gasoline and diesel engines! Meets or exceeds all manufacturer specifications for A3 / B3 / B4 - SM / SL / SJ / CF and JASO MA / MA2. Lower oil temperatures for longer oil life and less metal fatigue. High lubricity for faster acceleration and more RPM's. Protects against oil cavitation (foaming), a must for high-revving engines. Slows oil burning and raises oil pressure in worn engines.