AMSOIL Preferred Customer - Learn More
AMSOIL Fast Free Shipping
How long have AMSOIL lubricants been on the market?
AMSOIL products have been available since 1972, when AMSOIL 10W-40 Synthetic Motor Oil became the first synthetic motor oil to meet American Petroleum Institute (API) service requirements. Today, AMSOIL manufactures synthetic lubricants for virtually all automotive, powersports, commercial and industrial applications.
What is synthetic motor oil?
AMSOIL synthetic lubricants are chemically engineered to form pure lubricants. They contain no contaminants or molecules that don’t serve a designed purpose. Their versatility and pure, uniform molecular structures impart properties that provide better friction-reduction, optimum fuel efficiency, maximum film strength and extreme-temperature performance conventional lubricants just can’t touch.

Conventional lubricants, on the other hand, are refined from crude oil. Contaminating elements such as sulfur, nitrogen, oxygen and metal components such as nickel or vanadium are inherent to crude oil and cannot be completely removed through the refining process. The oil refining process separates the various types of molecules in the oil by weight, leaving molecules similar in weight but dissimilar in structure, reducing performance.
AMSOIL Synthetic Motor Oils
AMSOIL Gasoline Motor Oils
Gasoline Motor Oils
AMSOIL Diesel Motor Oils
Diesel Motor Oils
AMSOIL European Motor Oils
European Motor Oils
AMSOIL Racing Motor Oils
Racing Motor Oils
AMSOIL Motorcylce Motor Oils
Motorcycle Motor Oils
AMSOIL 2 Stroke Motor Oils
2 Stroke Motor Oils
AMSOIL 4 Stroke Motor Oils
4 Stroke Motor Oils
ATV & UTV Motor Oils
AMSOIL Marine Motor Oils
Marine Motor Oils
AMSOIL Other Products
AMSOIL Hydraulic Oil
Hydraulic Oil
AMSOIL Compressor Oil
Compressor Oil
AMSOIL Fuel Additives
Fuel Additives
AMSOIL Trasnmission Fluid
Trasnmission Fluid
AMSOIL Gear Lube
Gear Lube
AMSOIL Filtration Products
Filtration Products
AMSOIL Brake Fluid
Brake Fluid And
Power Steering Fluid
AMSOIL Suspension Fluid
Suspension Fluid
AMSOIL Antifreeze & Coolants
Antifreeze & Coolants
AMSOIL Cleaners & Protectants
Cleaners & Protectants
AMSOIL Firearm Products
Firearm Products
AMSOIL Oil Analysis & Service Kits
Oil Analysis & Service Kits
How do AMSOIL synthetic motor oils compare to other motor oils?
The importance of using good-quality oil in an engine cannot be overstated. AMSOIL synthetic motor oils consistently outperform conventional and other synthetic oils in virtually every category of performance, including wear protection, extreme high- and low-temperature performance, foam control, viscosity retention, rust and corrosion protection, volatility and fuel economy. While other brands may provide good performance in some of these areas, AMSOIL synthetic motor oils consistently perform at the top in every category. Drivers can have confidence knowing that AMSOIL synthetic motor oils provide maximum performance and protection.
Is there a recommended procedure for changing to AMSOIL synthetic motor oil?
There are no special requirements for changing to AMSOIL synthetic motor oil. However, in older vehicles with high mileage, it may be advisable to use AMSOIL Engine and Transmission Flush first. This will ensure the engine is clean and free of accumulated contaminants that may affect the service life of AMSOIL synthetic motor oil. Installation of an AMSOIL Oil Filter at every oil change is also recommended.
What is the difference between synthetic and conventional oil?
Answer: Motor oil, whether synthetic or petroleum-based, consists of molecular chains of hydrogen and carbon atoms, referred to as hydrocarbons. Petroleum crude oil is a thick, highly flammable dark-brown or greenish liquid with high energy density. Many contaminating elements exist in this complex mixture of hydrocarbons, including sulfur, nitrogen, oxygen and metal components such as nickel or vanadium. Petroleum crude oil is the raw material used for a wide variety of petrochemicals, including solvents, fertilizers, plastics and lubricants.

The oil refining process separates the various types of molecules in the oil by weight, resulting in a concentrated batch suitable for manufacturing products such as gasoline, LPG, kerosene or lubricant base oils. The chemical composition of conventional motor oil can vary substantially depending on the raw crude oil refining process.

While petroleum base oils are refined, synthetic base oils are manufactured and can achieve a higher performance level. Synthetic oil is chemically engineered for a certain molecular composition with a tailored and uniform structure. Such fine-tuned control over the final molecular composition of synthetic oils is the key to their superior performance properties. Designing molecular structures in a planned and orderly fashion results in molecules, and end-products, that are far more stable than their refined petroleum counterparts.