I read from time to time folks saying you can't store gasoline over 6 months, others a year.....just no way longer. Baloney. I regularly store it 3-4 years, and I dug out a drum this afternoon from Aug 2013 (when gas was $3.35/gal here). I normally try to rotate fuel a bit more than that, but I slipped around and let that one get by me. Pretty sure that's the longest I've personally stored gasoline and can vouch for. I'm getting a delivery in my 500gal tank that I use for stuff around the place, plus fill the car/truck from time to time if it's handier or cheaper than current town prices. Last fill of the big tank was June 2017....and it's an open vented tank.....so it goes 2 years just fine in that type of tank....with preservative. I DO use, and highly recommend, PRI-G for storage. (4 ounces/55gal when it goes into storage, another 4 per 55gal when I pump it into the 500gal overhead tank) When I cracked that nearly 6 year old drum open, it smelled just like fresh gas....no 'varnishy' smell at all. I put three drums in the big tank, and will have the Co-op fill the rest of it (335gal) with fresh gas (non-ethanol) just to play it safe, but I have used long stored gas directly in vehicles with no problem in the past. I normally store 6 drums of gasoline, and 9 drums of diesel fuel in addition to whatever is in the gravity feed 500gal gasoline tank and 300 gallon diesel tank.