Fuel that has had extended exposure to sunlight will run very unstable. You can never get the needle set. It will sound rich up to the lean cut off point. It will also quit on you in the air.

I use it to break in engines and clean engines with.

When I lived in the South years ago I would sometimes dribble it on fire ant beds at the flying field to kill the ants. I think the castor oil was more poisonous to them than the alcohol or nitro. We didn't have synthetic oil in those days.