Star Tron Enzyme Fuel Treatment - Small Engine Formula – Gas Additive Rejuvenates & Stabilizes Old Gasoline - Cures & Prevents Ethanol Problems

What It Is

Star Tron Enzyme Fuel Treatment is a gasoline additive formulated for small engines—lawn mowers, trimmers, chainsaws, and generators—that both rejuvenates old, stale fuel and prevents ethanol-related issues like phase separation, corrosion, and gum/varnish buildup. It uses a proprietary enzyme blend to break down sludge and keep fuel fresh for up to two years.

Fitment & Compatibility

• Engine types: Works with any 2-cycle or 4-cycle small engine using gasoline (up to E10 ethanol blends). Not for diesel or pure ethanol (E85) engines.
• Fuel volume: The 8 oz bottle treats up to 20 gallons (1 oz per 2.5 gallons). Use the entire bottle for a full tank in larger equipment like riding mowers or generators.
• No brand restrictions: Compatible with all major brands (Honda, Briggs & Stratton, Kohler, Toro, Stihl, etc.) and aftermarket engines.
• What to check: Ensure your fuel is conventional gasoline or E10—do not use with pure ethanol or racing fuel. For severely gummed-up engines, you may need to drain old fuel first.

Key Things to Know

• Quality: Highly rated (4.7/5 from 3,287 reviews) for reviving old gas that won’t start engines and preventing ethanol corrosion. Many users report it restores performance in stored mowers after one tank.
• Installation difficulty: Very easy—just pour the correct dose into your gas can or tank before filling. No mixing or special tools needed. Shake well before use.
• Common gotchas: Works best when added to fresh fuel for prevention; for already-gelled fuel, you may need to run the engine through a full tank to see results. Overdosing is safe but wasteful—stick to the ratio.
• Storage note: After treatment, stabilized fuel lasts up to 2 years in sealed containers—good for seasonal equipment. Does not fix mechanical issues like clogged carburetor jets; use a cleaner first if the engine won’t start.

Should You Buy It

Buy it if you have a lawn mower or other small engine that sits for months between uses, especially with ethanol-blended gas. It’s excellent for preventing starting problems and extending fuel life, and the price is low enough to be a no-brainer for one-season protection. Not needed if you always use ethanol-free fuel or run engines weekly.