Petron Plus Formula 7 Diesel Engine Conditioner QTY(1) Will not void vehicle warranties. Formulated for petroleum or sythetic oil. Helps to significantly reduce friction between moving parts. Increase fuel mileage. Lower operating temperature. Conditions seals. Protect against acid and corrosion. Quiets noisy engines. Starts quicker in cold weather. Increases engine life. Extends oil changes by 3-4 times, based on oil analysis. oil to metal,