Shelf Life


Is it not true that gasoline in any form will NOT deteriorate in storage as long as it’s stored in a completely air-tight container? I thought the only reason that gasoline will ‘get old’ is if it’s allowed to let it’s more volatile components evaporate out of it. No?


This post has been moved to the new Car Talk Discussion Area, by a Car Talk Lackey. The original poster is JohnJackson.


Gasoline begins to degrade in 6 months time and can get really nasty after about a year. Todays gasoline has been “cat-cracked”, it’s not a straight-run distillate anymore so it’s unstable. Also, it has been “reformulated”, blended with alcohol and co-solvents that are just waiting to phase-separate, sealed container or not…

Sealed container, completely dry, cool location, “Stabil” added, maybe you could store it for 2 years max…


And put Sta-Bil in it before two weeks go by if you know you are going to store it for a while.


Not really. There are chemical reactions that take place even in a totally sealed tank.