Meaner Power Kleaner has been tested safe and effective to use with todays Ultra Low Sulfur Fuel (ULSD). Loss of lubricity, lower BTUs and premature wear of the fuel injection system are some of the issues created by ULSD. Build up of deposits on fuel injectors and pumps can have a negative effect on power, fuel economy and durability. Meaner Power Kleaner adds lubricity, eliminates water problems, cleans and eliminates injector deposits, increases fuel economy and saves you money and fuel related down time.