STP Fuel Injector & Carburetor Treatment contains concentrated detergents that help dissolve and remove harmful carbon, gum, and varnish deposits from fuel injectors and carburetors. Regular use helps eliminate hard starts, improves acceleration, reduces rough idling, and maintains optimum engine efficiency. Also functions as an upper cylinder lubricant to reduce engine friction.

• Concentrated detergents dissolve carbon, gum, and varnish deposits
• Eliminates hard starts and rough idling
• Improves acceleration and engine performance
• Also functions as upper cylinder lubricant
• Helps maintain optimum engine efficiency
• Made with jet fuel for enhanced cleaning power
• Recommended use: every 4,000 miles
• 5.25 oz bottle