STP® Octane Booster

Octane booster. STP Octane Booster bottle

Helps restore horsepower by removing deposits and cleaning the fuel intake system.

This 2-in-1 formula boosts octane and cleans fuel intake system to restore lost performance.

Barely Street Legal

Deep cleans fuel system and helps

Usage Frequency

Use regularly when you fill up.

Treat Rate

  • 5.25 oz. bottle treats 21 gallons
  • 12 oz. bottle treats 28 gallons

Not sure which Fuel Additive to use?

Click here to view our comparison chart