This two-in-one formula boosts octane and cleans the fuel intake system to restore lost performance. Use regularly when you fill up your tank to help restore power and acceleration, boost octane and reduce knocking and pinging. STP Octane Booster is compatible with cap-less gas systems. Use regularly when you fill up your tank; 5.25 fl. oz. bottle treats up to 21 gallons of gasoline.

STP Octane Booster (5.25 fluid ounces):

• Helps restore horsepower by removing deposits and cleaning the fuel intake system
• Helps boosts octane
• Helps reduce knocking and pinging
• Helps restore performance
• Barely street legal formula restores power and acceleration
• Use regularly when you fill up your tank; 5.25 fl. oz. bottle treats up to 21 gallons of gasoline
• STP Octane Booster is compatible with cap-less gas systems