AMSOIL INC. was founded in 1972, but its story begins in the mid 1960s, when Lt. Col. A.J. “Al” Amatuzio, a jet fighter squadron commander, was impressed by the superb performance of synthetic lubricants in jet engines (in fact, only synthetics stand up to the performance demands of jet engines) and began studying their possible automotive applications. In the mid-1960s, Al Amatuzio began an intense period of research and development. He assembled the industry’s most knowledgeable chemists and in 1972 directed the formulation of the first synthetic motor oil in the world to exceed API automobile service requirements. For more than 30 years, the company has seen rapid growth and constant change. One driving force behind the success of AMSOIL is a commitment to quality and constant improvement. Through the years, AMSOIL has developed an increasingly broad range of automotive and industrial lubricants and filtration equipment, exceeding industry performance specifications and setting new industry standards for motor oil performance, quality and consistency.

409,000 Miles Without An Oil Change!

Colonial Heights, Virginia – Haywood Gray’s 1990 Mack E7-400 engine should have shown some evidence of having gone 409,000 miles without an oil change, but it didn’t. “I didn’t see any surprises in there at all,” said owner/operator Gray when the engine was finally torn down. In fact, analysis showed the engine was as wear-free as an engine in comparable service treated to 20 times the oil changes. The results can only be credited to AMSOIL. Haywood Gray used AMSOIL Synthetic 15W-40 Heavy Duty Diesel and Marine Oil, an AMSOIL By-Pass Oil Filter and periodic oil analysis. The E7-400 was torn down by the local Mack dealership and its parts were examined by a certified independent engine rater. It showed only light to moderate wear throughout. The rater even concluded that the engine parts could have been put right back on for continued use.



Independent Engine Rater Findings
Found the parts of this engine had very little to light wear after 409,000 miles without an oil change.  All the parts were considered in great condition and completely re-usable!  This is AMSOIL High Mileage Synthetic Oil doing what AMSOIL Intended.  Prolonging the life of your vehicle and giving you longer oil change intervals!  Saving you money both in regular maintenance fees and a longer lasting engine.


Today, virtually every other motor oil manufacturer has recognized the superiority of synthetic lubricants and has followed the AMSOIL lead with introductions of synthetic motor oils of their own. They spend millions of dollars advertising their “new” and “revolutionary” products. No one, however, can match AMSOIL experience and technological know-how. And no one delivers products like AMSOIL. Accept no substitutes — AMSOIL is “The First in Synthetics.”®

The Company of Firsts

Over 30 Years of Innovation and Leadership
• 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/12-month drain interval.
• First U.S. company to utilize the NOACK volatility test as a standard of performance excellence.
• First to produce synthetic motor oils for diesel engines, racing engines, turbos and marine engines.
• First to introduce synthetic oils that legitimately contribute to improving fuel efficiency.
• First to manufacture synthetic gear lube for automotive use.
• First to manufacture a 100:1 pre-mix synthetic 2-cycle oil.
• First to manufacture a synthetic automatic transmission fluid for automotive use.