Unleaded 88 is a blend of 85% gasoline and 15% ethanol. It is often referred to as E15 because of its 15% ethanol concentration. Unleaded 88 is approved for use in all cars made after 2001, light-duty trucks, and medium-duty SUVs. It is not recommended for use in motorcycles, heavy-duty trucks, or non-traditional vehicles like snowmobiles or lawn mowers. Unleaded 88 gets slightly lower gas mileage than regular unleaded, but it gives off fewer carbon emissions. The differences in gas mileage are minor, and experts say it is worth using if the price is low enough. Unleaded 88 is less expensive than regular unleaded fuel, and it burns cleaner and slower than regular unleaded, which has an octane rating of 87. The higher-octane level in Unleaded 88 helps boost horsepower and efficiency, and it reduces toxins, making it more environmentally friendly. Unleaded 88 is considered safe for use in cars made after 2001, and it has been thoroughly tested by the EPA and the U.S. Department of Energy.