The quality of gasoline will deteriorate over time. If you have old gasoline, it is important to dispose of it in a safe manner. This is a guide about disposing of old gasoline.
Solutions: Disposing of Old Gasoline
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If the gas is just old (not turned to varnish), you can mix old gas with fresh gas in roughly a 1 to 10 ratio and use the gas for lawnmowers, weed whackers, chainsaws, and other gas powered tools. The greater portion of the new gas reinvigorates the old gas. You can do the same thing with a car, but it isn't recommended. The older gas still affects plugs and gaskets negatively, even in small portions.
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