The following review was written by the editorial department of Chesapeake Bay Magazine.  

Sierra eGuard is a new fuel additive and treatment designed for use with ethanol-blend gasoline. It can be used with ethanol blends up to 85 percent and purportedly slows the process of phase separation by dispersing water throughout the fuel in particles small enough to pass through the engine. The product also serves as a fuel stabilizer, its makers say, and works to break up carbon and gum deposits in the fuel system and combustion chamber. Lastly, Sierra claims that eGuard boosts the combustibility of gasoline, thereby boosting engine power, performance and fuel economy. Both the 32-ounce ($25) and 8-ounce ($9) bottles come with a built-in measuring reservoir that lets you measure out the desired amount of additive. One ounce of eGuard will treat 10 gallons of fuel. Teleflex Marine;

November 2011