AMSOIL Synthetic
Gasoline Motor Oil

Uncompromising Performance.
Unmatched Protection.

AMSOIL synthetic motor oil is purpose-built to outperform conventional and synthetic-blend oils in every application. From daily drivers and diesel trucks to motorcycles, race builds, boats, and powersports machines, there's a formulation engineered specifically for your engine. Every product in this lineup is independently tested to deliver superior wear protection, cleaner operation, and longer-lasting performance than the competition.

Why engine owners trust AMSOIL:

Independently tested to outperform Mobil 1, Castrol, Valvoline, and Shell Helix
Molecularly engineered synthetic base oils that resist breakdown, reduce friction, and protect at extreme temperatures
Formulations for gasoline, diesel, European, powersports, racing, and marine engines
Extended drain intervals available across the lineup, reducing maintenance frequency and cost
Proven across millions of miles in passenger vehicles, commercial fleets, motorsports, and heavy equipment

Shop our full AMSOIL Motor Oil lineup and protect your engine with the best.

AMSOIL 5W-50 MS European Series Oil

High-viscosity MS-grade synthetic for high-output European engines demanding robust shear stability.

AMSOIL Formula 4-Stroke Synthetic Scooter Oil

Full synthetic protection for high-RPM air-cooled scooter engines, compatible with wet clutches.

AMSOIL 15W-50 Small Engine Oil

High-viscosity synthetic for commercial mowers and air-cooled small engines running in extreme heat.

AMSOIL 10W-40 Small Engine Oil

Synthetic 10W-40 for outdoor power equipment and compact utility engines running in hot conditions.

AMSOIL 10W-30 Small Engine Oil

Synthetic 10W-30 delivering superior wear protection and cleanliness for 4-stroke small engines.

AMSOIL 5W-30 Small Engine Oil

Full synthetic 5W-30 for 4-stroke lawn mowers, generators, and outdoor power equipment.

AMSOIL 25W-40 Synthetic Marine Engine Oil

NMMA FC-W certified synthetic blend for 4-stroke stern-drive and inboard marine applications.

AMSOIL 10W-40 Synthetic Marine Engine Oil

Full synthetic marine 10W-40 with anti-corrosion protection for inboard and stern-drive boat engines.

AMSOIL 10W-30 Synthetic Marine Engine Oil

Rust-inhibiting synthetic 10W-30 for 4-stroke inboard and stern-drive marine engines in all conditions.

AMSOIL 10W-40 Synthetic ATV/UTV Oil

Most popular ATV/UTV viscosity in full synthetic, resisting heat and shear in demanding side-by-sides.

AMSOIL 10W-30 Synthetic ATV/UTV Oil

Wet-clutch compatible synthetic for Honda, Yamaha, Kawasaki, and Polaris ATV and UTV engines.

AMSOIL 5W-50 Synthetic ATV/UTV Oil

High-performance 5W-50 ATV/UTV synthetic for sport machines running harder and hotter than stock.

AMSOIL 5W-40 Synthetic ATV/UTV Oil

Full synthetic ATV/UTV oil protecting shared engine and wet clutch sumps in aggressive off-road use.

AMSOIL Formula 4-Stroke Powersports Oil

Versatile full synthetic 4-stroke oil covering ATVs, UTVs, snowmobiles, and general powersports equipment.

AMSOIL 10W-60 Synthetic Dirt Bike Oil

Maximum-viscosity dirt bike synthetic for extreme heat or high-altitude MX and enduro competition.

AMSOIL 10W-50 Synthetic Dirt Bike Oil

High-film-strength 10W-50 synthetic for larger-displacement enduro and motocross engines in hot conditions.

AMSOIL 10W-40 Synthetic Dirt Bike Oil

Wet-clutch compatible synthetic engineered for the extreme heat and RPM of 4-stroke off-road engines.

AMSOIL 15W-50 Synthetic Metric Motorcycle Oil

High-viscosity synthetic for larger-displacement metric bikes in sustained high-speed riding conditions.

AMSOIL 10W-40 Synthetic Metric Motorcycle Oil

Superior shear stability and wear protection for metric sport, adventure, and touring bike engines.

AMSOIL 10W-30 Synthetic Metric Motorcycle Oil

Full synthetic 10W-30 for wet-clutch metric motorcycles including Honda, Yamaha, Suzuki, and Kawasaki.

AMSOIL SAE 60 Synthetic V-Twin Motorcycle Oil

Straight-weight SAE 60 synthetic for high-output V-twins demanding maximum film thickness under extreme heat.

AMSOIL 20W-40 Synthetic V-Twin Motorcycle Oil

100% synthetic 20W-40 for Harley-Davidson V-twin engines needing AMSOIL protection at factory viscosity.

AMSOIL 15W-60 Synthetic V-Twin Motorcycle Oil

Full synthetic 15W-60 matched to Milwaukee-Eight and modern Harley-Davidson platform specifications.

AMSOIL 20W-50 Synthetic V-Twin Motorcycle Oil

Purpose-built 20W-50 synthetic for air-cooled Harley-Davidson engines that generate extreme heat.

AMSOIL V-Twin Oil Change Kit (HDMC)

Complete 20W-50 synthetic oil and matched filter bundle for a full Harley-Davidson oil change.

AMSOIL V-Twin Oil Change Kit (HDMB)

All-in-one 20W-50 V-twin synthetic oil change kit with the correct AMSOIL filter for select HD models.

AMSOIL V-Twin Oil Change Kit (HDBK)

Full 20W-50 synthetic oil change kit with AMSOIL black filter for select Harley-Davidson applications.

AMSOIL V-Twin Oil Change Kit (HDCK)

Complete 20W-50 synthetic kit with chrome AMSOIL filter for Harley-Davidson owners who want it all.

AMSOIL SABER Professional 2-Stroke Oil

Ultra-versatile synthetic pre-mix oil for outdoor power equipment, usable at ratios down to 100:1.

AMSOIL Outboard 100:1 Pre-Mix 2-Stroke Oil

Synthetic 2-stroke pre-mix for direct injection outboard engines, clean-burning at ultra-lean 100:1.

AMSOIL HP Marine Synthetic 2-Stroke Oil

NMMA TC-W3 certified high-performance synthetic for demanding marine outboard 2-stroke engines.

AMSOIL INTERCEPTOR 2-Stroke Oil

Advanced synthetic 2-stroke engineered for modern semi-direct and direct injection snowmobile engines.

AMSOIL Synthetic 2-Stroke Injector Oil

Full synthetic injector-compatible 2-stroke oil for powersports, marine, and outdoor equipment engines.

AMSOIL DOMINATOR 100% Synthetic 2-Stroke Racing Oil

Maximum-protection competition synthetic for motocross, kart, and watercraft racing 2-stroke engines.

AMSOIL Briggs & Stratton 4T Racing Oil

Officially approved synthetic for Briggs & Stratton 4-stroke racing classes, maximizing protection per class rules.

AMSOIL DOMINATOR SAE 60 Racing Oil

Maximum-viscosity competition synthetic for extreme high-output drag and oval racing applications.

AMSOIL DOMINATOR 20W-50 Racing Oil

Heavy-duty competition synthetic for large-displacement V8 race builds requiring superior oxidation resistance.

AMSOIL DOMINATOR 15W-50 Racing Oil

Full-race synthetic 15W-50 for endurance and high-displacement competition engines under sustained load.

AMSOIL DOMINATOR 10W-30 Racing Oil

Purpose-built 10W-30 competition oil trusted by racers who can't afford an engine failure.

AMSOIL DOMINATOR 5W-20 Racing Oil

Competition-grade synthetic 5W-20 for high-RPM race engines demanding maximum film strength.

AMSOIL 15W-40 Heavy-Duty Diesel and Marine Oil

Dual-certified 15W-40 meeting API CK-4 and NMMA specs for mixed land and marine diesel operations.

AMSOIL 20W-50 Premium Protection Oil

Full synthetic 20W-50 upgrade for older high-mileage engines, pre-emissions vehicles, and air-cooled equipment.

AMSOIL 15W-40 Heavy-Duty Diesel Oil

API CK-4 synthetic in the standard 15W-40 viscosity, dramatically outperforming conventional diesel oils.

AMSOIL 15W-40 Signature Diesel Oil

AMSOIL's flagship Max-Duty 15W-40 for fleets demanding the longest drain intervals and lowest cost-per-mile.

AMSOIL 10W-40 Premium Protection Oil (Diesel)

Synthetic 10W-40 upgrade for older diesel engines and equipment requiring heavier multi-grade formulations.

AMSOIL 10W-30 Heavy-Duty Diesel Oil

API CK-4 full synthetic diesel oil for turbocharged trucks, farm equipment, and high-idle diesel applications.

AMSOIL 10W-30 Signature Diesel Oil

Max-Duty synthetic for mixed diesel fleets needing premium protection and maximum drain interval extension.

AMSOIL 5W-40 FS European Oil (Diesel)

Full SAPS diesel synthetic meeting VW 505.00/505.01 for turbocharged TDI and European diesel engines.

AMSOIL 5W-40 MS European Oil

Mid-SAPS European synthetic covering VW, BMW, and Mercedes-Benz specs for mixed diesel and gasoline fleets.

AMSOIL 5W-40 Heavy-Duty Diesel Oil

API CK-4 and ACEA E9 rated 5W-40 synthetic for on-highway and off-road turbocharged diesel engines.

AMSOIL 5W-30 Signature Diesel Oil

Max-Duty synthetic exceeding API CK-4 for hard-working tow vehicles and fleets demanding longer drain intervals.

AMSOIL 0W-40 Signature Diesel Oil

Max-Duty flagship diesel synthetic in 0W-40 for extreme-duty applications with extended drain intervals.

AMSOIL 5W-20 DOMINATOR Racing Oil

Competition-grade synthetic 5W-20 for high-RPM race engines demanding maximum film strength.

AMSOIL 5W-30 LS European Oil (Diesel)

High-viscosity MS-grade synthetic for high-output European engines demanding robust shear stability.

AMSOIL 5W-40 Signature Diesel Oil

Top-tier Max-Duty diesel synthetic in 5W-40 with industry-leading soot control and extended drain capability.

AMSOIL 0W-20 Synthetic Diesel Oil

Ultra-low viscosity API CK-4 synthetic diesel oil for modern light-duty diesel applications requiring 0W-20.

AMSOIL SAE 30 Break-In Oil

Controlled-friction SAE 30 formula engineered to properly seat rings in freshly built engines.

AMSOIL 20W-50 Z-ROD Motor Oil

High-zinc 20W-50 for air-cooled classics and big-block muscle engines requiring maximum film protection.

AMSOIL 15W-50 DOMINATOR Racing Oil

Race-grade 15W-50 with exceptional shear stability for high-RPM naturally aspirated and forced-induction engines.

AMSOIL 10W-40 Premium Protection Oil

Synthetic 10W-40 for older gasoline engines and small equipment needing heavier-viscosity protection.

AMSOIL 10W-40 Z-ROD Motor Oil

Elevated ZDDP synthetic for flat-tappet classics with added rust inhibitors for off-season storage.

AMSOIL 10W-40 XL Series Oil

Extended-drain full synthetic 10W-40 for older vehicles and engines prone to oil consumption.

AMSOIL 10W-30 Z-ROD Motor Oil

High-zinc 10W-30 synthetic protecting flat-tappet cams in classic engines during driving and storage.

AMSOIL 10W-30 OE Motor Oil

OEM-spec full synthetic 10W-30 for domestic and import vehicles needing heavier-grade protection.

AMSOIL 10W-30 DOMINATOR Racing Oil

Designed to maximize horsepower, resist viscosity breakdown, and provide wear protection for high-performance engines.

AMSOIL 10W-30 XL Motor Oil

Full synthetic 10W-30 with 10,000-mile drain intervals for older engines and light-duty trucks.

AMSOIL 10W-30 Signature Series Oil

Full Signature Series protection in 10W-30 for older vehicles needing maximum film strength.

AMSOIL 5W-50 Signature Series Oil

Flagship full synthetic 5W-50 with superior shear stability and 25,000-mile drain interval protection.

AMSOIL 5W-40 FS European Series Oil

Full SAPS 5W-40 meeting ACEA A3/B4 and VW 502.00/505.01 for older European performance engines.

AMSOIL 5W-30 LS European Oil

Low-SAPS 5W-30 meeting ACEA C2/C3 for Peugeot, Citroen, and Fiat DPF-equipped gasoline engines.

AMSOIL 5W-30 OE Motor Oil

Full synthetic 5W-30 designed to meet or exceed factory drain intervals and OEM protection requirements.

AMSOIL 5W-30 XL Motor Oil

Reliable full synthetic protection with 10,000-mile drain intervals for everyday drivers.

AMSOIL 5W-30 Signature Series Oil

100% synthetic with 50% more cleaning power and up to 25,000-mile extended drain intervals.

AMSOIL 5W-20 OE Motor Oil

OEM-spec full synthetic certified for turbos, direct injection, and API Resource Conserving fuel efficiency.

AMSOIL 5W-20 XL Motor Oil

Extended-interval full synthetic 5W-20 for turbocharged and direct-injection engines at a strong value.

AMSOIL 5W-20 Signature Series Oil

Outperforms leading brands in 100,000-mile wear tests with 25,000-mile drain intervals.

AMSOIL 0W-40 FS European Oil

Full SAPS synthetic meeting BMW Longlife-01 and MB 229.5 for flagship European performance engines.

AMSOIL 0W-40 Signature Series Oil

Signature Series protection in 0W-40 for high-performance European and AMG-spec gasoline engines.

AMSOIL 0W-30 Signature Series Oil

Top-tier 0W-30 synthetic delivering 25,000-mile protection for turbocharged performance engines.

AMSOIL 0W-20 European LS Oil

Low-SAPS synthetic meeting ACEA C5 for BMW, Mercedes-Benz, and Volvo emissions-sensitive engines.

AMSOIL 0W-20 European LS-VW Oil

Spec-matched 0W-20 meeting VW 508.00/509.00 for Volkswagen and Audi direct-injection gasoline engines.

AMSOIL 0W-20 OE Motor Oil

100% synthetic OE-spec 0W-20 meeting GM dexos1 Gen 2, API SP, and ILSAC GF-6 requirements.

AMSOIL 0W-16 Signature Series Oil

100% synthetic 0W-16 with 25,000-mile drain intervals for late-model Honda and Toyota engines.

AMSOIL 0W-20 XL Motor Oil

Full synthetic 0W-20 with 10,000-mile drain intervals meeting API SP and ILSAC GF-6 specs.

AMSOIL 0W-20 Signature Series Oil

AMSOIL's flagship synthetic with 25,000-mile drain intervals and 72% better turbo protection than required.