Primrose Injector Perfector 406 - Diesel and Gasoline Fuel DetergentCleans Fouled Injector and Intake Valves Delivers Increased Power and Fuel Economy Removes Combustion Chamber Deposits Eliminates Knock and Ping Decreases Engine Octane Requirements For diesel and gasoline fuels. Very popular for gasoline market. Injector Perfector is a detergent effective on all types of fuel deposits built up in the system. As a multifunctional additive providing superior intake valve deposit (IVD) cleaning, port fuel injection