For Gasoline engines only. Lucas Deep Clean is blended with an exclusive Lucas additive package and a specific carrier fluid that contains no diesel fuel, kerosene, or anything else that can be harmful or useless to an engine. This product reduces NOx emissions, eliminates the need for higher octane fuel, removes carbon deposits, and eliminates knocking and pinging. One bottle treats up to 30 gallons of gasoline. Lucas Deep Clean will bring a sluggish engine back to life if it has fuel system problems.