AMSOIL Synthetic Lubricant Products
AMSOIL has manufactured 100% synthetic lubricants since 1972, the company that pioneered synthetic motor oil in North America. Below is the full product range available through this authorized dealership, organized by vehicle and equipment type. Not sure what your vehicle needs? Call Alan directly at 225-441-6397, or jump to the category that matches what you're working on.
Is AMSOIL a Good Brand?
AMSOIL Inc. was founded in 1969 and released the first API-rated 100% synthetic motor oil in 1972, ahead of the major oil companies. The company still formulates and blends its own lubricants in Superior, Wisconsin rather than outsourcing to a contract blender, and backs its top-tier oils with drain intervals up to 25,000 miles or one year. AMSOIL sells through independent dealers rather than mass retailers — see why in the AMSOIL vs Amazon Basics guide — which is why you won't find it on store shelves or Amazon.
Shop by category
Nine product families covering everything from daily drivers to fleet diesels. Pick the one that matches your engine or equipment.
Diesel Truck & Heavy-Duty Oil
Synthetic diesel oil engineered for Cummins, Duramax, and Powerstroke engines, plus SAE J1321-tested fuel economy data for fleet and heavy-duty use.
View diesel & heavy-duty oilMotorcycle & Powersports Oil
Full synthetic oil formulated for metric and sport motorcycles, including wet-clutch-safe formulas and primary/transmission fluids.
View motorcycle & powersports oilHarley-Davidson Motorcycle Oil
AMSOIL synthetic oil formulated specifically for Harley-Davidson V-twin engines, primary chaincases, and transmissions.
View Harley-Davidson oilSignature Series & Specialty Motor Oil
Signature Series synthetic motor oil for cars, SUVs, and light trucks, plus specialty formulas for marine, European, and natural gas engines, backed by ASTM lab testing.
View Signature Series & specialty oilTransmission & Drivetrain Fluid
Synthetic ATF, gear lube, and transfer case fluid engineered for extended protection under heavy load.
View transmission & drivetrain fluidFilters
Ea Oil Filters and Air Filters engineered to match AMSOIL's extended-drain-interval synthetic oils.
View filtersOctane Boost & Fuel Additives
Octane boost and fuel-system additives for performance and fuel-system protection.
View fuel additives2-Stroke Oil
Synthetic 2-stroke oil for outdoor power equipment, snowmobiles, and small engines.
View 2-stroke oilBreak-In Oil
Non-detergent break-in oil formulated for new and rebuilt engines during the critical break-in period.
View break-in oilFrequently Asked Questions
What does AMSOIL stand for?
AMSOIL is not an acronym; it's the company's registered brand name. AMSOIL Inc. was founded in Minnesota in 1969 by Al Amatuzio and introduced the first API-qualified 100% synthetic motor oil in 1972.
Where is AMSOIL made?
AMSOIL formulates and blends its lubricants at its own manufacturing facility in Superior, Wisconsin, and ships to the US and Canada.
Why can't I find AMSOIL at a regular auto parts store or on Amazon?
AMSOIL sells through a network of independent dealers instead of big-box and online retailers, which lets it invest in the product instead of retail shelf space. See the full explanation in the AMSOIL vs Amazon Basics guide.
What AMSOIL product do I need for my vehicle?
It depends on the engine: gasoline cars and trucks use Signature Series or OE Synthetic motor oil, diesel pickups use the 15W-40 or 10W-30 Max-Duty line, and motorcycles need a wet-clutch-rated oil. Call Alan at 225-441-6397 with your year, make and model and he'll confirm the right grade.