Not a dealer or advertiser or selling anything, but I use the Marine formulation of Sta-bil myself. Here are some good snippets from their website:
Q: How does MARINE Formula STA-BIL® Ethanol Treatment and Performance Improver work, and how is it different from Regular STA-BIL? A: MARINE Formula STA-BIL Ethanol Treatment is a new, enhanced formula of STA-BIL, America's top selling fuel stabilizer, that was designed to fight many of the unique problems related to ethanol in gasoline in the moisture-laden marine environment, and fights those problems in three ways:
1.Fights Fuel System Deposits – Ethanol in gasoline acts as a solvent on the accumulated deposits in marine fuel tanks, fuel lines, carburetors, injectors. These loosened deposits can cause engine performance problems, including hard starting, rough running and stalling. MARINE Formula STA-BIL cleans-up power-robbing deposits from carburetors, fuel injectors and intake valves to improve engine performance. MARINE Formula STA-BIL contains more than FOUR TIMES the fuel system cleaner in Regular STA-BIL – it is a Complete Fuel System Cleaner. 2.Fights Fuel System Corrosion – Ethanol in gasoline attracts water from the moist marine air. Since virtually all marine fuel systems manufactured through 2007 vent to the air, the ethanol continually attracts water – which can cause corrosion damage to marine fuel tanks, fuel lines, carburetors and injectors. MARINE Formula STA-BIL contains DOUBLE the corrosion preventer in Regular STA-BIL, to fight the unique problems of ethanol in gasoline in the marine environment, including marine fuel tanks which vent to the marine air. 3.Fights Fuel Degradation – Pumped gasoline starts to degrade immediately. MARINE Formula STA-BIL keeps fuel fresh for up to 12 months in marine gas tanks. Just like Regular STA-BIL, adding MARINE Formula STA-BIL Keeps Fuel Fresh , and eliminates the need to drain fuel prior to storage.
Q: Why is using MARINE Formula STA-BIL® Ethanol Treatment a better way to store fuel than draining it from the fuel tank and fuel system? A: MARINE Formula STA-BIL should be used to store fuel in tanks, rather than draining fuel for several reasons. First, it is nearly impossible to get all of the fuel out of the fuel tank and fuel system simply by draining. To remove all of the fuel, the fuel lines and all of the fuel system components must be blown out or enough fuel will remain to cause gun and varnish to form. It is usually difficult to dispose of the drained fuel in an environmentally correct manner. Second, draining fuel exposes the bare metal in the tank and the fuel system to air and moisture that causes corrosion. Third, gaskets and seals may dry out or crack, leading to leaks when the tank and fuel system is refilled. The best solution is to fill the tank 95% full with fresh fuel and to immediately treat the fresh fuel with STA-BIL. back to top
Q: How long will MARINE Formula STA-BIL® Ethanol Treatment keep fuel fresh? A: MARINE Formula STA-BIL keeps fuel fresh for up to 12 months in marine gas tanks and gas cans. Adding STA-BIL prevents the formation of gum and varnish that can cause engine performance problems including hard starting, rough running and stalling.
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