Bardahl 3525-CS Fuel Conditioner + Octane Booster - 5 fl. oz.  (Case of 12) Increases the octane rating of gasoline while keeping injectors and intake valves clean to maintain power Disperses water, protects against rust and corrosion, decreases exhaust emissions, and improves fuel economy Reduces stalling, hard starting, rough idling and prevents drivability problems Stops knocking, pinging and engine run-on to prolong the life of a vehicle Safe to use; will not harm O2 sensor, catalytic converter or other components