Amaze your friends and cover up the smell of exotic fuels! Just add one 4 oz. fuel additive bottle of this concentrated fuel fragrance to 30-55 gallons of alcohol, 10-30 gallons of gas or nitromethane, or 5-10 gallons of diesel and you are ready to run. These fragrance additives do not enhance or inhibit performance and are safe to use in all internal combustion engines. For best results use in vehicles without catalytic converters.