Try racing fuel that has been sitting in dirt track cars over the winter, sucks to waste 9$ a gallon fuel but boy does it cause a hellavah flame vs. pump gas.-Weeks
You probably paid $2.30 cents a gallon for it 3 years ago. It's worth $3.80 cents a gallon now. Sell it for a profit!
EXACTLY what I do at my shop. Small amounts I toss on the concrete in the sun. That's gone in a few minutes. Larger amounts I put in a table buss-tray and set it on my flat roof in the sun (even mixed with water it evaporates). A day will get rid of four gallons or so (the gas, not the water).