Wild Willy fuel fragrance is a direct pour in fuel odorant that will eliminate unpleasant fuel odors. Fuel Fragrance can be used in pump gas, methanol, ethanol, diesel fuel and race gas. Wild Willy fuel fragrance is safe for all internal combustion engines, fuel injectors, carburetors and is safe for 02 sensors and catalytic convertors. Currently over 60+ fragrances available. This product blends clear with all fuels.