Does gas go bad after years of sitting?

Yes, gasoline can go bad after sitting for an extended period, typically around three to six months. Over time, it can degrade due to oxidation, evaporation of volatile compounds, and the formation of varnish or gum. This can lead to reduced engine performance, starting issues, and potential damage to fuel systems. To prolong its shelf life, using fuel stabilizers and storing it in a cool, dry place can help.