AMSOIL Guide To 2-Stroke - Gasoline Fueled Compact Engines

For 2-stroke engines, there is the important aspect of getting oil into the engine. The oil may be mixed with the fuel prior to putting the fuel into the tank (pre-mix), or a special injector pump mounted on the engine may inject the oil into the fuel-air stream. When an injector is used, the oil is stored in a small tank.

Another point to consider, most of the oil introduced into a 2-stroke engine is burned in the cylinder. Therefore, a 2-stroke oil must burn clean without producing excessive deposits of carbon on the pistons and especially on the piston rings. As important is the amount of oil residue that blows out the exhaust.

The chart below helps remove the guess work of choosing the 2-stroke oil for your application. AMSOIL Synthetic 2-stroke oils provide excellent lubricity and cleanliness. They prevent plug fouling, ring sticking and exhaust port blocking. Their anti-rust formulation counteracts damp environments often found in 2-stroke applications.

For additional information on a given product, click on the AMSOIL product code

Oil Type	AMSOIL Product Code	Product Name	Description
Pre-mix only	ATP	AMSOIL SABER Professonal	Recommended for handheld pre-mix two-stroke power equipment including, but not limited to: chainsaws, trimmers, blowers, brush cutters, edgers, ice augers, and shredder vacs. Designed for per-mix applications at fuel/oil ratios up to 100:1. For use when an API TC oil is called for. Contains fuel stabilizer.
Pre-mix only	ATO	AMSOIL SABER Outboard	Recommended for pre-mix water-cooled two-stroke outboard motors, personal watercraft and jet boats. Designed for per-mix applications at fuel/oil ratios up to 100:1. For use when an NMMA TC-W3 oil is called for.
Injector or Pre-mix	AIT	AMSOIL INTERCEPTOR	Use in all two-stroke snowmobiles, motorcycles, ATVs, PWCs and where API TC oils are specified. Use as injection oil or 50:1 premix.
Injector or Pre-mix	HPM	AMSOIL HP Marine	Recommended for use in all two-cycle outboard motors. For use when an NMMA TC-W3 or API TC oil is called for. Excellent for Evinrude® E-TEC™ factory-lean setting. Use as injection oil or 50:1 pre-mix.
Injector or Pre-mix	AIO	AMSOIL Injector Oil	Recommended for use in all two-stroke outboard motor and snowmobiles and where API TC and NMMA TC-W3 oils are specified. Use as injection oil or 50:1 pre-mix. Great for the casual enthusiast that wants the convenience of one oil for the boat and snowmobile.
Injector or Pre-mix	TDR	AMSOIL DOMINATOR	Use in high-performance stock or modified two-stroke engines, including air- or liquid-cooled snowmobiles, personal watercraft, motorcycles (moto X), ATVs, go-carts and outboard motors**. Good for use with coated or non-coated pistons, high-octane racing fuels and exhaust power valves. ** Not suitable for long-term use in outboard motors as a TC-W3-type oil, although excellent as a race oil for short-term use where motors are periodically inspected.

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