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Engineered for Performance and Protection

AMSOIL is a leader in synthetic lubrication solutions, offering products designed to enhance engine performance, reduce wear, and extend service life. With a reputation for quality and innovation, many AMSOIL diesel and motor oils deliver guaranteed protection for up to 25,000 miles, making them a preferred choice for those seeking reliability and efficiency.

AMSOIL Product Lineup

Motor Oils

High-performance synthetic oils for gas, diesel, and hybrid engines.

Transmission Fluids

Precision-engineered fluids for automatic, manual, and power sports transmissions.

Gear Oils

Long-life, extreme-pressure, and chain case gear oils for superior protection.

Fuel Additives

Premium treatments to clean, protect, and boost engine efficiency.

Filters

High-efficiency oil, air, and bypass filters for extended engine life.

Greases

Racing, multipurpose, and water-resistant greases for durability.

Cleaners & Protectants

Advanced solutions to repel mud, protect metal, and enhance performance.

Merchandise & Accessories

Tools, banners, stickers, and more to showcase your AMSOIL pride.

Apparel

High-quality shirts, jackets, and hats for AMSOIL enthusiasts.

Stay Informed & Updated

Understanding Oil Viscosity

12/11/2025

Viscosity is the measure of a fluid's resistance to flow. The physical properties of lubricants...

Unmatched Protection for Every Drive

AMSOIL’s advanced formulas provide unmatched protection, whether for daily use or high-performance applications. Reach out today to get access to top-tier AMSOIL products. Whether you need AMSOIL transmission fluid or accessories, we are your right choice.

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AMSOIL Dominator Racing Oil bottle, 10W-30.

AMSOIL DOMINATOR® 10W-30 100% Synthetic Racing Oil

AMSOIL DOMINATOR® 10W-30 Racing Oil is formulated to meet the...

AMSOIL DOMINATOR® 15W-50 100% Synthetic Racing Oil

AMSOIL DOMINATOR® 15W-50 Racing Oil is designed to excel in...

AMSOIL Dominator Racing Oil bottle, SAE 60.

AMSOIL DOMINATOR® SAE 60 100% Synthetic Racing Oil

AMSOIL DOMINATOR® SAE 60 100% Synthetic Racing Oil is a...

Briggs & Stratton synthetic racing oil bottle.

Briggs & Stratton Synthetic 4T Racing Oil

Briggs & Stratton Synthetic 4T Racing Oil is the brainchild...

AMSOIL Break-In Oil (SAE 30)

AMSOIL Break-In Oil is an SAE 30 oil formulated without...

AMSOIL Dominator 2-Stroke Racing Oil bottle.

AMSOIL DOMINATOR® 100% Synthetic 2-Stroke Racing Oil

AMSOIL DOMINATOR® 100% Synthetic 2-Stroke Racing Oil is engineered for...

AMSOIL 15W-40 Heavy-Duty 100% Synthetic Diesel Oil

AMSOIL 15W-40 Heavy-Duty Synthetic Diesel Oil is formulated for hardworking...

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

AMSOIL 15W-40 Synthetic Heavy Duty Diesel & Marine Motor Oil...

Amsoil diesel oil bottle, black background.

AMSOIL Signature Series 5W-40 100% Synthetic Max-Duty Diesel Oil

Outstanding extreme-pressure protection Delivers 6X more wear protection1 Maintains proper viscosity (thickness) Minimizes oil...

AMSOIL diesel oil bottle, black packaging.

AMSOIL Signature Series 15W-40 100% Synthetic Max-Duty Diesel Oil

Outstanding extreme-pressure protectionDelivers 6X more wear protection1Maintains proper viscosity (thickness) Minimizes oil consumptionMaximizes fuel efficiencyExcels in extreme...