Features and Benefits: Greatly reduces harmful NOx emissions. Removes carbon deposits. Totally eliminates knocking and pinging. Raises mpg and performance. Contains no diesel fuel, kerosene or anything else that can be harmful or useless to an engine. Lucas Deep Clean is blended with an exclusive Lucas additive package and specific carrier fluid that contains no diesel fuel, kerosene or anything else that can be harmful or useless to an engine. It also reduces NOx emissions, eliminates the need for higher octane fuel and deep cleans the entire fuel system and combustion chamber.