Hot answers tagged recycle
Depending on how old it is (<1 year for me) i have always just mixed it with fresh fuel and used it like normal. No problems. Fuel older than a year makes a great grease cutter, it does a great job at loosening up bolts, old parts, and grease and crud off of skin. Be sure not to use in enclosed spaces, only recommended to use outdoors.
When you change your oil, there are places that will take your used motor oil. My Dad's shop uses used motor oil as fuel in the furnace to keep the garage warm in the winter. I know this seems obvious to many, but it never surprises me the number of people that would just dump this stuff in the grass :(
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