REV-X Ultimate Kit for Diesel Engines - High Performance Oil Additive (2) + Ultimate Diesel Fuel Stabilizer Cleans and Protects your engine and fuel system with the Highest Performing Diesel Additives Available. Increase Engine Performance, Fuel Economy, Engine Efficiency, Horsepower and Torque. Dissolves stiction in injectors and turbo chargers without using dangerous chemical strippers. Highly recommended for all diesel engines including passenger cars. Ultimate Diesel Fuel additive increases cetane levels by a minimum of 8 points.