AMSOIL FORMULATES A WIDE SELECTION OF SYNTHETIC LUBRICATING OILS for all types of engine and gear applications, including those for specialized vehicles and severe operating conditions. In addition, AMSOIL has developed sophisticated fuel additives, filtration systems and other companion products that supplement and extend lubricant performance. This complete line of quality products is recognized by countless private motorists, fleet managers and industrial administrators as the best and most cost-effective choice for increasing engine performance, reducing maintenance and prolonging vehicle and equipment life

-First to develop an API-rated 100 percent synthetic motor oil.

-First to introduce the concept of "extended drain intervals" with a recommended 25,000-mile/1-year drain interval.