See how AMSOIL products perform in the lab and in the field.

Keep Power Exhaust Valves Clean

Snowmobile Engines with Power Exhaust Valves

Modern snowmobile engines are manufactured to meet new government standards to run leaner with fewer emissions. This inadvertently has caused engines to run hotter placing new demands on free flowing injector oils in cold winter temperatures, and leaner means that less oil has to do the same job of lubricating the internal engine parts. AMSOIL synthetic 2-stroke injector oil remains fluid on the coldest winter days and providing superior lubricity to internal engine parts with less oil from startup to wide open throttle.

Power exhaust power valves: engineered to increase usable power over a wider RPM band; better power at start (low RPM) and more power at higher RPM.

However, the main issue with power exhaust valves is sticking and/ or complete failure to operate. Why do they stick? Primarily because of the valve’s location in the exhaust stream of the engine. Any unburnt fuel oil mixture after combustion creates carbon deposits that build up over time on the power exhaust valve. If the valve sticks closed, the engine will not have top speed, and the engine will run extremely hot potentially causing further a very costly repairs. If it sticks open the low speed of the engine will be very bad, when the rider throttles up to take off the machine just won’t do it.

For many sled enthusiasts maintaining their machine is just as satisfying as riding them. And, working in a heated garage with all your tools at hand is far better than freezing at the side of a trail trying to fix a problem. More riders are choosing Amsoil synthetic snowmobile products to service their machines to ensure easier cold temperature engine starts, less smoke and exhaust odor and the peace of mind that their machines will withstand wide-open throttle riding all day long.

Known issues with power exhaust vales

Known issues with power exhaust valves

  • Failure to operate by sticking open or closed
  • AMSOIL prevents power valve failure, keeping your machine running safely on the trail.

Interceptor Cold-Weather Protection

In cold weather snowmobile oil must perform at start-up and while running at wide-open throttle. Modern engine power valve design, needs oil to move quickly at start-up and while running. AMSOIL reaches to the critical parts of the engine faster, protecting against start-up wear so the engine runs smooth and delivers the best performance from start-up to shut-down and more fun on the trail for you.

Comparison -40 (˚F) for 12 hours. AMSOIL INTERCEPTOR® compared to: Ski-Doo XPS® 2-Stroke Synthetic Oil; Arctic Cat® 2-Cycle Synthetic C-TEC2; Polaris® VES Full Synthetic 2-Cycle Oil.

2-Stroke Injector Oil

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2-stroke injector oil

Injector Oil (AIT)

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Interceptor 2-stroke

Racing Oil (AIO)

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Dirt bike 2-stroke

Formula 4-Stroke®
Motor Oil (AIO)

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Formula 4-Stroke

Chaincase & Gear Oil

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Chaincase & Gear oil

Water Resistant Grease

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Water resistant grease

Suspension Fluid
#5 light (STL)

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Shock Therapy #5 light

Suspension Fluid
#10 medium (STM)

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Shock Therapy #10 medium

Powersports Coolant

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Powersport Coolant


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Gasoline Stabillizer

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gasoline stabillizer

Octane Boost (COBBE)

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Dominator Octane Boost
Powersport and racing catalogue

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last update June 1st, 2021
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