The additive in Bar's Products Rislone Fuel Injector Cleaner with Upper Cylinder Lubricant lubricates the fuel pump, injectors and upper cylinder to reduce the friction and wear that cause noise. This formula also smoothes rough idle, eliminates hard starts and reduces carbon build-up that causes pre-ignition, power loss, burned valves and broken rings. Sizes available: single-use 6-oz bottle (No. 4701), 32-oz bottle (No. 4732), 5-gal. pail (No. 4701-5) and 55-gal. drum (No. 4701-55). Standard dose is approximately 3 oz per 10 gallons of fuel.