Engineered with Castrol GTX technology & Castrol Syntec molecular components. American Petroleum Institute certified. For gasoline engines. Superior Short Trip protection. Castrol Syntec Blend is specially engineered with proprietary Castrol GTX technology and Castrol Syntec molecular components to provide superior short trip protection. Frequent short trips are considered a severe driving condition that can lead to premature engine wear. Castrol Syntec Blend is specially formulated to provide maximum wear protection under any severe driving condition, including towing and hauling, severe temperatures, and stop and go traffic. Protect your car with Castrol Syntec Blend. Castrol Syntec Blend provides: Exclusive formulation provides unsurpassed protection against engine wear. High level of fuel economy based on US industry standards. Additional stability and protection against thermal breakdown compared to conventional oils. Prevents harmful engine deposits. Castrol Syntec Blend is compatible with all conventional and synthetic motor oils. Exceeds: API Service SM/SL/SJ/SH; ILSAC GF-4/GF-3/GF-2; API Certified Gasoline Engine Oil, GM6094M. Made in the USA from domestic and imported counterparts.