Comparing Fuel Additives

Combat the effects of ethanol with the right fuel additive.

Star brite Star Tron
The Pump: Star Tron, from the Star brite company, uses enzyme technology to break down excess water and sludge in fuel, reducing them to submicro sizes so they can be safely burned off during engine operation. It prevents the formation of gums and other solids that clog carburetors and fuel injectors. One ounce treats up to 16 gallons of gasoline. It not only works for ethanol issues, but it can also increase power and improve efficiency. The Gas: The company claims it will stabilize stored fuel for up to two years. Price: $14.79 for 8 ounces;
Star brite
Sta-Bil 360 Marine Ethanol Fuel Treatment and Stabilizer
The Pump: The only additive claiming to have the ability to prevent corrosion both above and below the fuel line. It helps remove water from the fuel, treats and protects against ethanol, and stabilizes gasoline for up to 12 months. For in-season use, 1 ounce treats up to 10 gallons, and to store, use 1 ounce for 5 gallons of fuel held in the tank. The Gas: Sta-Bil claims to emit a vapor that protects fuel-system components from problems, like corrosion, that others don't. Price: $32.99 for 12 ounces;
ValvTect Ethanol Gasoline Treatment
The Pump: Formulated and developed with the cooperation of petroleum refiners, it has been tested to prevent ethanol and entrained moisture in the gasoline from dropping to the bottom of the fuel tank. The ValvTect product contains a corrosion inhibitor and a detergent to prevent intake-valve deposits and to clean fuel injectors. It ­stabilizes fuel for up to a year, and 1 ounce treats 10 gallons of gas. The Gas: Claims to be manufacturer and ASTM verified as effective. Price: $15.49 for 12 ounces;

Ethanol in fuel worries boaters even more now, with the introduction of gasoline with 15 percent ethanol, or E15. Some of the biggest names in fuel-system additives have come out with their own products to combat the effects of ethanol. Here are three of the most popular.