Lucas Semi Synthetic Motor 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 exclusive additive package in Lucas Semi Synthetic Motor Oil is excellent for use in turbo charged engines. GUARANTEES lower oil temperatures, for longer oil life and less metal fatigue. Provides a tougher, thicker oil film for maximum protection against metal to metal contact. Has higher lubricity for faster acceleration and more RPM's. Protects against oil cavitation (foaming), a must for higher revving engines. Slows oil burning and raises oil pressure in worn engines. Provides better protection against cold weather dry starts. Designed for use in both petrol and diesel engines.