The First in Synthetics

AMSOIL did this in 1972. Everyone else advertised it later.

Al Amatuzio introduced the world’s first API-qualified synthetic motor oil from a garage in Superior, Wisconsin. The dealer network followed in 1973 because the bottle could not explain itself on a shelf next to cheap conventional oil. Independent dealers still do that explaining.

1. 01

   World-class wear protection

   Signature Series was run 200 hours at 302°F — 100° hotter than a typical operating temperature — to measure wear, deposits, and breakdown. Independent testing of Signature Series 0W-20 showed 75% more engine protection against horsepower loss and wear than a leading industry standard requires.

2. 02

   The 25,000-mile oil

   Fewer changes mean less oil purchased, less labor, less waste. Signature Series is formulated for up to 25,000 miles or one year, whichever comes first, in normal service. That is not a dare to skip the dipstick. It is a reserve of chemistry most oils do not have.

3. 03

   Extreme temperature

   Uniform synthetic molecules slip past each other instead of stacking into wax. The result is cold-cranking that conventional 5W oil cannot match, and a high-temp film that does not boil off into the PCV system.

4. 04

   Less waste oil

   If the 243 million cars in the U.S. ran Signature Series at a 15,000-mile year and a 5,000-mile conventional habit, the country would use more than 2.4 billion fewer quarts a year. Extended drains are an environmental argument as much as a wallet one.