Built molecule
by molecule.
Conventional motor oil is refined. AMSOIL is engineered. That difference is why AMSOIL has set the benchmark for synthetic lubricant performance since pioneering the first API-certified synthetic motor oil in 1972.
Synthetic Base Stocks
AMSOIL is built from premium synthetic base oils — uniform molecules engineered in a lab, not refined from impure crude. The result: fewer contaminants, less friction, and longer service life.
Thermal Stability
Resists oxidation and viscosity breakdown at temperatures that destroy conventional motor oil. Stays in grade through 100°C+ operating heat and turbocharged stress.
Cold-Weather Flow
Pumps freely at -40°C and below — critical for Canadian winters. Reaches vital engine components seconds faster on cold starts, when up to 80% of engine wear occurs.
Wear Protection
AMSOIL Signature Series exceeds the wear-protection requirement of GM dexos1® Gen 3 by 75%, keeping cams, lifters and rings in spec for hundreds of thousands of kilometres.
Cleanliness
Robust detergent and dispersant chemistry prevents sludge, varnish and LSPI events that plague modern direct-injected turbo engines.
Extended Drain
Guaranteed protection for up to 40,000 km or one year (Signature Series). Less waste oil, less downtime, lower total cost of ownership.
Tested in the worst conditions on Earth.
AMSOIL is proven in Baja desert racing, Arctic fleets, Daytona endurance, and Canadian oilfield service. If it can survive there, it will protect your engine.