Chevron Techron Fuel System Cleaner-6 Pack (20 oz.) Cleans, restores, protects the entire fuel system (fuel injectors, carburetors, intake valves and combustion chambers) Restores: lost power, acceleration, lost fuel economy, and operation of the fuel gauge sensor Reduces: rough idle, engine surge, hesitation, and spark plus fouling Improves: cold start performance, and fuel stability for up to one year Automobiles and trucks use every 3,000 miles or at your next oil change