What fuel do the vast majority of snowmobiles use?

The vast majority of snowmobiles use gasoline as their fuel.

Most snowmobiles are powered by internal-combustion gasoline engines, traditionally two-stroke designs and increasingly four-stroke engines. Gasoline engines offer a useful combination of relatively low weight, high power, compact size, and quick throttle response—important traits for machines that must climb, accelerate, and maneuver over snow.

The exact fuel specification varies by model. Manufacturers may recommend regular or premium gasoline, often identified by an octane rating such as 91. Some modern gasoline contains ethanol, so riders should follow the manufacturer’s guidance about ethanol concentration and storage. Two-stroke machines may also require oil to be injected separately or mixed with the gasoline, depending on the engine design.

Diesel snowmobiles have existed in specialized or experimental applications, and electric snowmobiles are an emerging alternative. Those exceptions do not change the standard answer: gasoline remains the dominant fuel for conventional recreational snowmobiles. Natural gas is not the normal choice for these lightweight, high-performance vehicles.