Prestone Complete Fuel System Cleaner

Application Method: Add the entire 16 oz (473 mL) bottle to a nearly empty fuel tank, then fill the tank with gasoline. Dosage: One 16 oz bottle treats up to 20 gallons (approx. 76-80 litres) of fuel. Frequency: For optimal performance and continued protection against corrosion, it is recommended for use every 3,000 to 4,000 miles (approx. 6,000 km) or at every oil change.