Mobil oil and filter change for Fleet or Personal use. Featuring AMSOIL SYNTHETIC LUBRICATION. The First to develop an A.P.I. rated 100% synthetic motor oil. The First to introduce the concept of "EXTENDED DRAIN INTERVALS" with a recommended 25,000-mile/12 month drain interval. Amsoil offers original equipment change, and 10,000 mile or 6 months, Chang when you want to. The First to produce synthetic motor oil for diesel engines,turbo's,and marine engines The First U.S.Company to utilize the "NOACK " volitility test as a standard of performance excellence. The first to introduce synthetic oils that legitimately contribute to improving fuel efficiency. The First to manufacture synthetic Gear Lube for Automotive use. The first to manufacture a 100:1 pre-mix synthetic 2 cycle oil. The First to manufacture a synthetic Automatic Transmission Fluid for automotive use