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Longest time to use fuel before it is old?

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Longest time to use fuel before it is old?

Old 04-28-2009, 01:24 PM
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rowdog_14
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Default Longest time to use fuel before it is old?

I have a friend that gave me fuel, synthetic 15%, and said he has had it for about a 1 1/2. I has been opened but it is about 3/4 full. Is this fuel to old to use or will I be OK.
Old 04-28-2009, 03:55 PM
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Default RE: Longest time to use fuel before it is old?


ORIGINAL: rowdog_14

I have a friend that gave me fuel, synthetic 15%, and said he has had it for about a 1 1/2. I has been opened but it is about 3/4 full. Is this fuel to old to use or will I be OK.
First of all the cap are tight against moisture to enter in the fuel can since the methanol are hygroscopic.
Then if the model engine works well in all trottling and easy to start, the fuel are not attacked by moisture, use the fuel until all fuel in the can are empty before you are buying the new fuel can next time.
Old 04-28-2009, 08:45 PM
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rowdog_14
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Default RE: Longest time to use fuel before it is old?

I did not buy it someone gave it to me. I was told by someone that if you let fuel lay around to long it goes bad, because moister gets in it. I will take you advice and run the engine with that gas and see how it runs. Hopefully it runs good cause it is almost a gallon and that is a lot of flying that I can do with a .46 glow engine.
Old 04-29-2009, 03:44 AM
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Lille-bror
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Default RE: Longest time to use fuel before it is old?

Hey Row

Take a look in the buttom of the bottle. There must not be any precipitate.

Cheers
Old 04-29-2009, 09:17 AM
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Jim Thomerson
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Default RE: Longest time to use fuel before it is old?

I have a half gallon or so of Red Max 5% that is @ 30 years old. I run some of it though an engine on the bench from time to time. Seems to run OK.
Old 04-29-2009, 03:57 PM
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Default RE: Longest time to use fuel before it is old?

Thanks everybody

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