Fuels Illegal in Garbage or Drains Hazardous Waste Never Pour Down the Drain A few spilled drops of gasoline can contaminate large quantities of clean drinking water. Never pour gasoline on the ground or down the drain. It will harm the environment and could lead to an explosion. Store Only 25 Gallons or Less Fire codes allows homeowners to store up to 25 gallons in containers, which hold no more than five gallons each. Ways to Reuse Fuel Gas-Powered Tools If you’d like to avoid putting old gas into your car, try using it in your gas-powered tools. Lawnmowers, leaf blowers and chainsaws can run on it. Give to Your Neighborhood Landscapers Offer unwanted gas to landscapers working in your neighborhood. They may be happy to take it off your hands, but make sure to disclose the fuel’s age.