Although the label says Gasoline, in fact, you can also use this product in Diesel.
Star Tron is available in several concentrations. Choose which version to purchase by the size of the fuel tank you're treating, not the type of fuel.
This version is a lower concentration in which 1 ounce treats 6 gallons of fuel.
The 1 ounce bottle is ideal for treating smaller quantities of fuel, so its marketed for use in smaller engines with smaller fuel tanks which typically burn gasoline.
Use it for small outboard motors, lawn mowers, motorcycles, scooters, snowmobiles, ATVs, generators, and chain saws - with fuel tanks typically in the to 25 gallon range.
This way youre typically measuring ounces, or fractions of an ounce - instead of fractions of a drop of the concentrated stuff.

StarTron contains enzymes and additives which consume and disperse harmful microbial growth, clean the fuel delivery system and combustion chambers, stabilize fuel chemistry, and reduce engine emissions.
Importantly, StarTron also helps prevent water separation in the tank by dispersing moisture in the fuel into sub-micron particles that are safely eliminated while the engine operates.
A year-round treatment, Star Tron stabilizes fuel chemistry and prevents oxidation for up to two years - making it ideal for winterizing or storing boats

Works in all 2- and 4-cycle engines burning gasoline or diesel boats, automobiles, RVs, generators, oil burning furnaces, etc.
Saves money by lowering fuel system maintenance
Allows engines to start easier and run more smoothly
Improves cruising range and fuel economy
Prevents problems related to E10/ethanol-blended fuels
Regular use keeps burners, fuel injectors, and carburetors clean
Rejuvenates old fuel that has been sitting in the tank
Eliminates sludge-forming bacteria
Removes carbon, gum, and varnish deposits - and prevents future deposits
Reduces cold weather gelling in diesel
Reduces soot in diesel emissions
Does not contain any poisons or pesticides

Note - you cannot overdose with StarTron. Petroleum-based, adding too much StarTron wastes money, but will not harm your engine.