Motor Oil Info

AMSOIL products are tested to ensure they not only meet, but surpass the demands of the engine and operating environment for which they are developed. We recognize the importance of performance and reliability, which is why we engineer our two stroke oil with high quality chemistries to exceed industry standards and address specific demands of various two stroke applications.

In general, AMSOIL Dominator is ideal for two stroke racing applications; AMSOIL Interceptor is ideal for two stroke recreational equipment; hp injector and Saber outboard are ideal for two stroke marine equipment; and Saber Professional is ideal for lawn and garden power equipment.

Of the current two stroke specifications, NMMA TC-W3 is probably the most well known. It was developed by marine engine manufacturers for water cooled outboard engines; however, it has been deemed appropriate for other two stroke engines by many manufacturers of land based two stroke engines.

API TC is a long standing specification that applies  to air cooled engines, which may include those with a radiator. JASO and ISO two stroke specifications apply to air cooled engines commonly found on handheld power equipment.

Other area of importance for two cycle engines, Exhaust port deposit control to keep exhaust valves functioning, fluidity for oil injection systems, miscibility for mixing oil with gasoline at cold temperatures and rust protection for storage. Specifications are in place to help consumers choose the right oil for their applications.

Two stroke specifications are developed and managed by multiple governing bodies, including the Japanese Automobile Standards Organization (JASO), the International Standards Organization (ISO) and the National Marine Manufacturers Association (API) also has a specification for two stroke engine oils. Most of these organizations have adopted standards focused on lubricity, detergency and prevention of pre ignition.

Prevention of pre ignition in the combustion chamber is important for efficient two stroke operation. If the by products of burned fuel and oil accumulate inside the combustion chamber, deposits can build on top of the piston (the crown). Piston crown deposits can absorb heat from the burning fuel and oil, creating hot spots that can ignite the fuel/oil mixture before the spark plug fires, which is known as pre ignition.

Pre ignition can cause the temperatures and pressures in the combustion chamber to rise beyond the failure limits of the piston and head gasket, resulting in catastrophic engine damage. Ultimately, prevention of pre ignition requires a lubricant carefully formulated with the proper detergent additives in the right amounts for effective deposit control.

Lubricity describes an oil’s friction reduction properties. Lubricity is critical for managing the excess heat and high operating rpm common in two stroke engines. High heat is generated not only from the rapid combustion process, but also from piston to cylinder friction. Two stroke applications require a lubricant that withstands the HEAT! If the oil burns off too easily from combustion or does not provide the needed lubricity for piston lubrication, piston scuffing will occur, causing lost performance and even engine failure.

Detergency describes a lubricant’s ability to control engine deposits. In two stroke engines, deposit control is especially important on the piston skirt and ring areas in order to prevent ring jacking and ring sticking. Ring jacking occurs when deposits accumulate behind the piston rings and force them against the cylinder wall, rupturing the lubricant film. Ring sticking is caused by deposit formation on the top and bottom of the ring within the ring groove that prevents the ring from forming a proper seal in the cylinder. If a proper seal is not formed, gases and heat from the combustion process can escape past the piston and burn the protective lubricant off the cylinder wall.

Two stroke engines are lubricated by oil that is consumed during the combustion process. In addition, combustion occurs on every revolution of the crankshaft in a two stroke application, compared to every other revolution in a four stroke engine, which generates more heat and places greater demand on the lubricant.

The oil burned in the two stroke combustion process can leave deposits on the piston crown, skirts and ring grooves. Two stroke oil must be formulated to burn as cleanly as possible and control deposit formation; excessive deposits can result in engine failure. The high heat and tendency for deposit formation in two stroke engines necessitate an oil with excellent lubricity, detergency and ability to prevent pre-ignition.

AMSOIL Ea Oil and Air Filters are Fully synthetic media brings maximum efficiency to the auto/light truck market.

A filter’s efficiency refers to its ability to stop dirt and other contaminants from entering the engine. AMSOIL Ea Oil Filters trap and hold 98.7 percent of particles 20 microns and larger, while competitive filters demonstrate efficiencies  as low as 51 percent. Ea Air Filters boast high capacities as well, holding  up  to 2.5 times more contaminants than cellulose filters. Their unique media construction enables Ea Air filters to maintain high airflow without compromising efficiency.

Used with AMSOIL Synthetic Motor Oils, Ea Oil Filters have a maximum recommended service life of either 15,000 miles or 25,000 miles, depending on the application. Ea Air Filters provide 100,000 miles/four years of service with annual cleaning using a shop vacuum or compressed air. Both lines of filter save motorists time and money.

P.i. ranks among the most potent gasoline additives available today. As a concentrated detergent, it is outstanding in cleaning combustion chamber deposits, intake valve deposits and port fuel injector deposits, eliminating the need for expensive fuel injector cleaning procedures.

It is ideal for use prior to emissions inspections, and it helps maintain peak engine efficiency, fuel economy, power and drivability in newer low mileage engines. In engines with accumulated deposits, P.i. provides up to 5.7 percent improved fuel mileage after only one tank of gasoline. A single treatment of P.i. also delivers reduced emissions, restored power and performance, reduced need for higher octane fuel, reduced carbon rap and preignition, better drivability and smoother operation.

AMSOIL INC. became the first company to safely extend oil drain intervals to 25,000 miles or one year, dramatically cutting the amount of oil consumed, waste oil generated and tailpipe emissions produced nationwide.

AMSOIL Synthetic Motor Oils advanced lubricity (slipperiness) helps optimize fuel economy, reducing fuel consumption and America’s dependence on foreign oil. They resist high temperature volatility (burn off), reducing oil consumption and air pollution emissions. Use of AMSOIL Synthetic Lubricants benefits consumers, vehicles and the environment.

Synthetic lubricants can provide increased fuel economy compared to conventional lubricants. Many AMSOIL customers have reported receiving substantial fuel economy benefits after installing AMSOIL Synthetic Motor Oil, Transmission fluid and Gear lube throughout a vehicle.

AMSOIL Synthetic Lubricants help reduce wear, inhibit deposit and sludge formation and lower operating temperatures, even in severe service. The superior protection they provide translates into equipment that lasts longer and requires less maintenance, saving motorists money.