Does gasoline go bad?
Yes, gasoline starts to go bad when it is about 1 month old.
After 6 months you should not burn it in an engine unless you have
put a fuel stabilizer in it. In that case it will be usable for
about 8 months. This is also important with small gasoline engines
on lawnmowers for example. Bad or old gasoline can damage a small
engine very easily.