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Old 02-27-2010, 08:19 AM   #1
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Default storing fuel for a few months - any consequences?

I've heard many times that keeping opened case of fuel for a few months is bad. "You better throw it away or it may damage your engine".

I want to know what actually happens to resting fuel. Is the nitro percentage lower than in a brand new fuel (i've heard such opinions)? Is it useless after winter?

For example, i opened my case in july and haven't used everything (don't ask why ). I don't want to throw away the rest unless it's necessary.

I've also heard that the oil will precipitate unless you shake the fuel once in a while. Is it true?


One of the reasons why i'm asking is that in my country nitro fuel is near three times more expensive than in USA...
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Old 02-27-2010, 10:30 AM   #2
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I cannot speak for everybody's brand of fuel, but if the it is a good quality fuel you should be able to use it. Just make sure the fuel looks the same as when you stored it away. Also when you store your fuel you should keep it in a cool dark place if available. You will probably hear at least 75 different opinions on this subject but I can only speak of what my particular brand of fuel will do. There are also many other brands of fuel on the market that are reliable and can be stored without issue. Good luck.
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Old 02-27-2010, 10:42 AM   #3
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I run Byrons (Race 25% if it matters) and it is stored in quite dark garage in more less 5-15*C (40-60*F). The color seems to be the same like in brand new case.
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Old 02-27-2010, 11:24 AM   #4
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The main problem(that I've been told) w/ storing fuel is that nitro fuel absorbs moisture from the air. So if possible, transfer your leftover fuel into a smaller bottle. Store it in cool dark place w/ low humidity.
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Old 02-27-2010, 01:16 PM   #5
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not looking too good for me then, I have o'donnel 20% fuel and it is stored in my garage during the winter. There was about 1/2 of the fuel left when I put it away, and it probably gets around 30 degrees F in my garage. I frequently notice that the colder it is, the plastic gets kind of sucked in? Is this bad?
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Old 02-27-2010, 01:39 PM   #6
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The sucking in from the air and fluids contracting and expanding depending on temperature. I store my fuel under my workspace out of direct sunlight and at a constant 20-30c all year. It can sit like this for 6 months without a problem in my experience.
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Old 02-27-2010, 01:42 PM   #7
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That's just the air contracting from the cold. I would say,"When in doubt, throw it out". Better to buy new fuel than have to buy a new engine. But, ultimately, it's your decision. The longest I've stored fuel in a half empty gallon has been a month and didn't have any problems.
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Old 02-28-2010, 07:29 PM   #8
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My neighbor has given me 3 gallons of mugen fuel that was 3 years old. Ran it in my nova and evrything was fine. They were sealed bottles in a closet in his garage.
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Old 02-28-2010, 07:38 PM   #9
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the main thing is to make sure you dont leave the bottle directly on a concrete floor. it will suck the moisture up from the concrete and ruin the fuel
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