Same here too. I was given quite a bit of old fuel ranging from 5% to 20% that was 8 years old and it worked just fine. It was kept under a bench without any temp control but the caps were all on tight. The temp went from the high 20s to the high 100s where it was stored. There was humidity over the years but nothing like you get in a lot of states, this was from the central valley of Calif. and not the mid west or east coast.