Improves engine efficiency & removes internal carbon deposits from marine engines.

• Sierra combustion cleaner fuel additive
• Dissolves gum and varnish build up in fuel system
• Frees sticky piston rings
• Displaces moisture in fuel
• Can be used as a fuel stabilizer for winter storage
• For use in both 2-cycle & 4-stroke marine engines
• Mix 1 to 2 ounces to every one gallon of gasoline
• 12 ounce bottle