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Cox Engine of The Month
Fuel shelf life
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Fuel shelf life
I'm getting back into model airplanes after a long spell away and fiddling w/several 1/2As, Cox reed and OK Cub.
I have nearly a quart of Byron Premium 1/2A fuel which has been stored in the original bottle, indoors in a dark closet, for maybe 8-10 years.
I've increased the castor content to 25%, but I'm wondering:
Does fuel degrade over that period?
Or should I just try it and see if anything'll run?
Thanks.
Terry
I have nearly a quart of Byron Premium 1/2A fuel which has been stored in the original bottle, indoors in a dark closet, for maybe 8-10 years.
I've increased the castor content to 25%, but I'm wondering:
Does fuel degrade over that period?
Or should I just try it and see if anything'll run?
Thanks.
Terry
wha-tah-hey- Rest In Peace
- Posts : 264
Join date : 2013-12-04
Location : Elgin, Al
Re: Fuel shelf life
Try it. Can't hurt anything. Normally 20-22% oil is more than adequate. I have had fuel last quite a while and have even run fuel that was 40+ yrs old.
Ron
Ron
Cribbs74- Moderator
-
Posts : 11907
Join date : 2011-10-24
Age : 50
Location : Tuttle, OK
Re: Fuel shelf life
The extra oil is more in consideration of the Cubs I hope to run.
Seems highly recommended for them.
If you've run 40+ yr old, mine oughta be good.
Tnx Ron.
Terry
Seems highly recommended for them.
If you've run 40+ yr old, mine oughta be good.
Tnx Ron.
Terry
wha-tah-hey- Rest In Peace
- Posts : 264
Join date : 2013-12-04
Location : Elgin, Al
Re: Fuel shelf life
Light degrades nitromethane. It releases some water in this process. Water degrades methanol. Oxygen degrades castor.
So, original, sealed bottle kept in the dark in a "climate controlled" environment...Does it look like it should? If it looks fine after being in those conditions it probably is fine.
If the color is significantly different (black/brown) or there is excess particulate then I would consider tossing it. I disposed of 2 quarts of BLACK fuel that was stored in metal containers. It had an off odor about it too.
Phil
So, original, sealed bottle kept in the dark in a "climate controlled" environment...Does it look like it should? If it looks fine after being in those conditions it probably is fine.
If the color is significantly different (black/brown) or there is excess particulate then I would consider tossing it. I disposed of 2 quarts of BLACK fuel that was stored in metal containers. It had an off odor about it too.
Phil
pkrankow- Top Poster
- Posts : 3025
Join date : 2012-10-02
Location : Ohio
Re: Fuel shelf life
Well, looks good, smells good, no sediment/trash - I'll give it a try when the weather warms up.
WAAAAAAAAY too cold outside rifht now for this ol' feller!
Terry
WAAAAAAAAY too cold outside rifht now for this ol' feller!
Terry
wha-tah-hey- Rest In Peace
- Posts : 264
Join date : 2013-12-04
Location : Elgin, Al
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