Technical Specifications
Mfgr: Star Brite, Inc.
Type: Enzyme Fuel Treatment
Size: 16 oz.
MSRP: $21.50

Overview
Fuel treatment additives and stabilizers have been around for years.  Most of them consist of some formulation of naptha or alcohol, and are designed to either stabilize fuel, or improve combustion in situations where small amounts of water have formed inside the fuel lines or tank.
  
With the advent of E10 ethanol (alcohol) blended gasoline in my area several years ago, I began to notice greatly reduced fuel storage life.  The 10% ethanol in E10 fuel is hygroscopic, meaning that it will attract water from the air which is absorbed into the fuel.  This lowers fuel octane and intensifies the tendency of the gasoline to separate into layers.  It attacks some rubber/synthetic fuel lines (I replaced mine) and promotes corrosion in the fuel system (it takes only a tiny flake of rust to jam the tiny orifices of carburetors on a small gas engine). 

In my case, fuel stored in my spare gas cans began to separate into layers in as little as two weeks.  My chainsaw and boat motors became very hard to start and ran poorly unless I drained the tank and the carburetor float bowl after each use.  Even then I still had problems, and had to disassemble and clean the outboard’s carburetor twice.  Since my problems originated with the E10 ethanol gas, I first tried (unsuccessfully) to find gasoline without it.  Then I decided to try a fuel stabilizer.  I knew I didn’t want a product that contained alcohol, since that ingredient was the source of my problems.  After trying several fuel treatment products, I settled on Star Tron®.

Product Formulation
Star Tron is a fuel treatment formulated for use in all 2 and 4-cycle gasoline engines (it's also advertised as a diesel fuel supplement, but I have not used it for this purpose).  It consists of purified naptha with 5% active ingredients.  The manufacturer considers these ingredients proprietary, but states they are based on naturally occurring enzymes (biocatalysts) which increase and control the rate of fuel burn, improve combustion, break down fuel sludge and disperse water in the fuel as sub-micron sized droplets that can be burned in the engine.

Star Tron is also designed to stabilize fuel chemistry for long-term storage. It’s important to remember that Star Tron is best used to preserve fresh fuel; like most other fuel additives, it cannot ‘restore’ fuel that has large amounts of water in it.             

User Experience
For the last three years I have used Star Tron in all of my small gasoline engines and fuel tanks that use E10 blended gasoline.  While I cannot speak to this product’s various claims about fuel enzymes and chemical interactions, I can state that it has worked much better than similar fuel treatments and ‘dry gas’ additives I have tried. 

Star Tron contains no alcohol, and I found that fuel dosed with the product stores for three months or more without separating.  I no longer have to drain the gas tanks on my small two and four-cycle engines after each use, but only when putting them away for the season.  And I haven’t had to tear down a carburetor in three years.
         

Recommended: Yes