[JayJay]

Adding a bit to my earlier suggestion of evaporation, if you don’t want liquid hanging around while it evaporates, add a bunch of floor dry and then spread out the saturated floor dry on a drip pan and let it evaporate outside that way. Turn it regularly (say once a day). I’ve done this with gasoline, mineral spirits and with diesel. At the end you’ll have floor dry you can reuse. ♻️

I’ve had very poor luck actually running old gasoline in an engine. Totally fouled the carburetor in my generator by letting the fuel go stale. It’s the ethanol that does it. I did dilute a gallon of that fuel in the 20+ gallon tank of my pickup and it seemed ok, but in hindsight I won’t do that again.