America's Original Synthetic - Trusted by Montana's Toughest Machines
We don't just sell AMSOIL. We live it, breathe it, and run it in every single vehicle we own—from our daily drivers to ranch trucks, tractors, side-by-sides, snowmobiles, and backup generators.
When Montana's brutal winters drop to -30°F and our high-altitude summers push engines to their limits, there's only one lubricant we trust: AMSOIL Synthetic Motor Oil.
Founded in 1972 by Lt. Col. Albert J. Amatuzio, AMSOIL became the first synthetic motor oil in the United States to meet American Petroleum Institute (API) service requirements.
Lt. Col. Amatuzio, a jet fighter squadron commander, recognized the extraordinary performance advantages of synthetic lubricants used in jet engines. He saw an opportunity to bring that same advanced protection and performance to the automotive and powersports industries.
For over 50 years, AMSOIL has remained the leader in synthetic lubrication technology—constantly innovating, constantly improving, and constantly proving that synthetic is superior to conventional petroleum-based oils in every measurable way.
Engineered for extreme conditions. Perfect for Montana.
AMSOIL's superior formulation means you can go up to 25,000 miles or 1 year between oil changes with AMSOIL Signature Series (15,000 miles for XL Extended Life). That's fewer oil changes, less waste, and more time doing what matters.
Montana winters are no joke. AMSOIL flows instantly at -40°F, protecting your engine from cold-start wear. In summer heat, it maintains viscosity and prevents thermal breakdown. From frozen mornings to scorching summer workdays, AMSOIL has you covered.
AMSOIL reduces friction and heat, freeing up horsepower you didn't know you had. Dyno tests consistently show power gains and improved fuel economy. Your truck, tractor, or sled will run cooler, stronger, and more efficiently.
AMSOIL exceeds industry standards for wear protection by up to 75%. Metal-on-metal wear is virtually eliminated, extending engine life and reducing costly repairs. Your investment is protected mile after mile, year after year.
AMSOIL's detergents and dispersants keep engines spotless. Sludge and deposits don't stand a chance. We've seen engines with 200,000+ miles that look brand new inside thanks to AMSOIL.
We've put AMSOIL to the test in everything we own—farm equipment under heavy load, snowmobiles in backcountry powder, daily commuters racking up miles. It has never let us down. Ever.
If your vehicle, equipment, or powersports machine faces any of these Montana realities, you need AMSOIL:
Whether you're plowing snow at dawn, pulling a horse trailer through the mountains, or pushing your snowmobile through powder, AMSOIL gives you the protection and performance Montana demands.
From everyday commuters to heavy-duty workhorses
Our flagship oil. 25,000-mile drain intervals. Unmatched protection.
15,000-mile protection at an accessible price point.
Built for racers and performance enthusiasts.
For Montana's hardest-working trucks and equipment.
We know Montana's conditions. We'll recommend the right products for your specific equipment and use case—not an algorithm.
Sign up as a Preferred Customer through us and save up to 25% off retail prices. No monthly fees, no gimmicks.
Buy direct from an authorized AMSOIL dealer. No counterfeit risk, no third-party sellers.
Your purchase supports a family-owned Montana business, not a mega-corporation.
Shop our complete catalog or contact us for personalized recommendations.
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