Contents
Need to dispose of old gas? Learn safe methods for getting rid of stale or contaminated gasoline without harming the environment or breaking the law.
Is Your Gas Too Old to Use?
Gasoline degrades after 3–6 months (ethanol-blended fuel goes bad faster). Signs it’s spoiled:
✔ Strong sour smell (like varnish)
✔ Dark or murky color (fresh gas is clear/amber)
✔ Gummy or separated layers
Never use old gas in engines—it can damage fuel systems!
Safe Ways to Dispose of Old Gasoline
1. Take It to a Hazardous Waste Facility (Best Option)
- Most cities have free drop-off for hazardous liquids.
- Search “[Your County] hazardous waste disposal” for locations.
- Store gas in an approved container (labeled “flammable”).
2. Mix with Fresh Gas & Use in Small Amounts
- Only if the gas is slightly old (not contaminated).
- Dilute 1 part old gas with 5 parts fresh gas in a lawnmower/older car.
3. Let a Mechanic or Auto Shop Handle It
- Some repair shops accept old gas for proper disposal (may charge a small fee).
4. Use a Fuel Stabilizer (For Future Prevention)
- Add Sta-Bil or Sea Foam to fresh gas to extend its life up to 12 months.
What NOT to Do With Old Gas
❌ Dump it on the ground (toxic, illegal, fines up to $10,000+).
❌ Pour it down drains/sewers (contaminates water).
❌ Burn it in open air (fire/explosion risk).
❌ Throw it in regular trash (flammable hazard).
How to Store Gas Properly (To Avoid Waste)
✅ Use an approved gas can (metal or EPA-certified plastic).
✅ Keep in a cool, dry place (away from sunlight).
✅ Fill containers 95% full (reduces air exposure).
✅ Label with date (so you know when it expires).
FAQ: Old Gas Disposal
Q: Can I dump old gas in my car’s oil for disposal?
A: NO! This ruins engine oil and can cause fires.
Q: Does old gasoline evaporate if left open?
A: Yes, but slowly—and the fumes are dangerous. Never leave gas exposed.
Q: Will auto parts stores take old gas?
A: Most don’t—check local hazardous waste programs instead.