If your boat motor is running a little rough, add the Star Tron® Quick Fix Engine Rescue to your fuel for smooth running performance. This cutting-edge fuel additive combines polyetheramine (P.E.A.) – the most powerful deposit-control detergent available – with time-tested proprietary Star Tron ENZYME technology. Together, they clean injectors and valves, removing carbon deposits, gum, and varnish. This fuel treatment from Star Tron even removes any moisture build-up. All this performance adds up to better engine performance and fuel efficiency. Suitable for all gas engines. One 4-oz. bottle treats up to 20 gallons of gas. Add to boat fuel for smooth-running performance. Most powerful deposit-control detergent available. Star Tron ENZYME technology. Removes carbon deposits, gum, varnish. Cleans injectors and valves. Removes moisture build-up. Enhances fuel efficiency. Dangerous goods must be shipped via ground transportation to a physical address. This item cannot ship to a PO box or Rural Route. Additional shipping fees may apply. Hazardous Material. Must ship ground only. Not eligible for expedited shipping. Contiguous 48 states only. A physical address is required for delivery. LTD QTY - In the event you wish to return this item, due to regulatory requirements, please contact customer service and we will provide the special shipping label and instructions required for the return of this item.