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In article ,
says...

In article ,
says...

Every problem I have heard about ethanol involved old gas but "old" is
measured in months not years..

True, the same with gas without ethanol.

Nope and yep.
I've run one and a half year old untreated E10 many times with no
issues.
Had to dump some 2 year old weed wacker gas once.
So I measure old in years. Not months. Measure "old" how you want to.
I've seen references that the API (American Petroleum Institute)
recommends storing gas no more than 2 years, but can't find the cite on
the API website. That's gas not treated with "stabilizers."
I've also seen firsthand reports of a guy testing untreated gas stored
in a jerry can for use in his lawnmower. He used the last of it after 8
years and it worked fine. He had a small lawn.
Nearly everything you see about gas going bad fast is from people
pumping "stabilizers." Seems they they add that stuff not because
they've had a problem with "old gas," but because it's "common wisdom."
Everybody has to decide what works for them. I don't live in a humid
area, my equipment is mine, and maybe I'm blessed.
There's 3 common causes of gas going bad:
1. Contamination. Buy uncontaminated gas, and don't contaminate it.
2. Evaporation. Keep your gas in unvented containers.
3. Oxidation. Unvented containers, and keep cool. Heat speeds
oxidation. This is so called "stale" gas. You can easily spot the bad
color if you pour a bit in a clear container before you put it in your
engine. Refineries add anti-oxidants, but if your stored gas is getting
stale, go with an aftermarket additive.
Ethanoled gas is just a whipping boy. Complaints about old gas and
watered gas long predates E10.

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