A diesel engine produces more particulate in the system as a result of combustion that can create deposits in the fuel system and can lead to reduced fuel economy and power. Short stop and go trips are more susceptible to this build-up of deposits, typically due to the diesel particulate filter not getting hot enough to regenerate. By keeping your engine lubricated, STP® Diesel Additives can help reduce friction, heat buildup and overall engine wear. In addition, specialized STP® Diesel Additives can help stop oil leaks, reduce oil consumption and exhaust smoking.