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<< Back to: Gasoline FAQ - Part 4 of 4

Question by TONY
Submitted on 8/18/2003
Related FAQ: Gasoline FAQ - Part 4 of 4
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Answer by e.b.
Submitted on 10/21/2003
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about a year.


Answer by Dr. Petro
Submitted on 10/27/2003
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This is a misnomer, gas does not go bad.  However, due to condensation it can be bad for your Vehicle if it is allowed to sit for to long in its tank without any use.


Answer by Aussie Dave
Submitted on 9/19/2004
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The more volatile components of gasoline do tend to evaporate faster than other components. It will still work but the octane rating may suffer. I have used gas from a junkyard which was really old but it was not in an engine that I cared about.


Answer by revrick
Submitted on 1/2/2006
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Gas does go bad, and it is not because of condensation, but actual chemical reactions.


Answer by Jet Doc
Submitted on 5/30/2007
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Misnomer - "a misapplied or inappropriate name or designation". Looks like Dr. Petro knows gas as well as he knows English.
Gasoline will break down over time. It will still burn but with decreased efficiency and with more deposits left behind. Stabilize your gas (with an additive for this purpose) if it will sit for several months (e.g. - over the winter.)


Answer by the lawnmower man
Submitted on 6/2/2007
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Do you guys know what your are talking about.  The shelf life on gas is 14 days.  After 14 days gas will lose properties.  How long it will last depends on many variables.  However, I have been a technician for 30 years.  I am certified by anyone who will certify.  I have even taught small engine repair.  You should never plan on keeping gas longer then a month.  90 percent of small engine running problems come from bad gas.  Since it easy to rotate your gas, it is easy to stop this common problem.  By the way, in the northeast, there are additives put in the gas for winter time which shortens the shelf life.


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