• Yamaha ring free plus
• 12 ounce bottle treats 120 gallons
• Exclusive synthetic formula is specially formulated for E10 fuels
• Improves power in 2-stroke and 4-stroke marine engines
• Cleans entire fuel system protecting engine from premature failure
• Prevents corrosion and rust
• Contains metal filmers to help protect fuel system components like silver solder, copper, aluminum, and steel from the corrosive affects of ethanol sulfate salt