E15 gas is a type of gasoline that contains 15% ethanol and 85% gasoline. It is one of several ethanol fuel blends available on the market, but it is different from regular gasoline because of its ethanol content. E15 has been available through retail distributors since 2012 and is blended primarily for 2001-and-newer cars and SUVs. It is also approved for use in flexible fuel vehicles, all motorcycles, all vehicles with heavy-duty engines, such as school buses and delivery trucks, and all off-road vehicles, such as boats and snowmobiles.

E15 is cheaper per gallon than typical unleaded blends, and it works in most 2001-to-present gas-powered pickups. It also has a higher octane rating than regular 87-octane fuel, which reduces engine knock and promotes greater overall efficiency and power. However, E15 is not approved by the EPA for use in non-automotive engines like boats, motorcycles, lawn mowers, and other small or off-road engines because it wasnt tested. E10 remains the limit for passenger vehicles older than model year 2001 and for other non-road and small engines and vehicles that use gasoline.

In summary, E15 gas is a blend of 15% ethanol and 85% gasoline that is cheaper than typical unleaded blends and has a higher octane rating. It is approved for use in most 2001-to-present gas-powered pickups, flexible fuel vehicles, all motorcycles, all vehicles with heavy-duty engines, and all off-road vehicles. However, it is not approved for use in non-automotive engines like boats, motorcycles, lawn mowers, and other small or off-road engines.