Over the years I have made many buyouts of folks stuff and it has frequently included remaining fuel even up to eight or ten years old and in every case the unopened fuel was always good and I used it.

Caviets with unopened fuel would be in metal cans if heavy corrosion was evident or in the case of plastic jugs if they had become leakers from the seams which in either case could make the fuel unusable.

If you do end up with fuel that is a problem and you do not wish to use then do not get rid of it. Fuel is very usefull for long completely immersed soaks for engines that are stuck from castor deposits. You will find it very useful for this.

John