The majority of buses run on diesel fuel. Diesel engines last longer than gasoline engines. Some older buses still in use run on gasoline.
Since diesel runs cleaner than gasoline and provides better overall fuel efficiency, it is a popular choice for larger-capacity vehicles such as buses. This also keeps buses running more efficiently and preserves their lifespan better than gasoline.
School Bus Specifics
School buses typically use diesel fuel, which provides better fuel efficiency and engine lifespan compared to gasoline. The fuel tank capacity varies by bus model, but ranges from 40-60 gallons for most school buses. Some smaller buses may hold only 70 gallons, while larger models could have 120-gallon tanks. On average, a full tank allows a school bus to travel about 200 miles.
Clean diesel engines are built to operate efficiently for 15-20 years. This durability exceeds gasoline or propane engines, which may need replacement every 2-3 years. Over 95% of school buses run on reliable, safe diesel engines for this reason. Though options like propane and electric exist, diesel remains the most common and practical school bus fuel choice.