Star Tron Fuel Tank Cleaner – Removes Sludge, Varnish & Other Deposits – Helps Restore Performance of Old, Stale Fuel – Concentrated Formula for Gasoline and Diesel Tanks

What It Is

Star Tron Fuel Tank Cleaner is a concentrated additive for gasoline and diesel tanks that dissolves sludge, varnish, and gum deposits left by old or stale fuel. It’s designed for lawn mowers, tractors, generators, and other small engines that sit unused for long periods.

Fitment & Compatibility

• Fuel Type: Works with both gasoline and diesel tanks. Not for 2-cycle oil mix or ethanol-blended fuel (use Star Tron Enzyme Fuel Treatment for ethanol issues).
• Tank Size: One 8 oz bottle treats up to 12 gallons of fuel. For smaller tanks (1–5 gal), use 1 oz per 12 gal ratio—measure with the included graduated cap.
• Engine Types: Safe for carbureted and fuel-injected engines, including lawn mowers, zero-turns, string trimmers, chainsaws, and pressure washers.
• What to Check: Verify your fuel tank is metal or plastic (safe for both). Do not use if tank has standing water—drain water first.

Key Things to Know

• Installation difficulty: Easy. Add directly to fuel tank, then run engine for 10–15 minutes to circulate. Let sit 24+ hours for heavy deposits.
• Quality: Concentrated formula works faster than most fuel additives—often clears clogged carburetors without disassembly. 4.5/5 rating from 1,012 reviews.
• Common gotchas: Not a substitute for draining old fuel—works best when mixed with fresh fuel. May loosen large sludge chunks that clog fuel filters; have a spare filter on hand.
• Storage: Unused concentrate lasts 2 years if sealed and kept in a cool, dry place.

Should You Buy It

Buy this if you have a mower or small engine that’s been sitting with old fuel, runs rough, or won’t start due to varnish or sludge. It’s a reliable, low-cost fix before you pay for carburetor cleaning or replacement. Skip it if your fuel is fresh or you need an ethanol stabilizer.