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  #11  
Old 12-19-2011, 06:54 AM
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plehrke plehrke is offline
 
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Quote:
Originally Posted by RV6_flyer View Post
Article was written by a Shell Engineer.
I would expect the oil companies to be conservative and put on a date. Cost them nothing to publish a date and they get to have people throw away un-used gas and buy new gas. Also helps with the lawsuits as they can claim old gas past their recommended usage date if there is ever an issue.

Would like to see analysis from a lab.
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  #12  
Old 12-19-2011, 07:11 PM
cguarino cguarino is offline
 
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Default Last a long time

I posted this once but it was deleted for some reason. I have stored 100LL for over 2 years and did not notice any difference when I did use it. YMMV.
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  #13  
Old 12-19-2011, 07:27 PM
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LifeofReiley LifeofReiley is offline
 
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The true being known, 100LL IMHO will cause ill effect after a year of storage. Will it work and still burn, yes... but it does cause some havac.
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  #14  
Old 12-19-2011, 07:36 PM
hudgin hudgin is offline
 
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I collected the daily sumped fuel out of the gas truck for a car I had for a couple of years in a 5 gallon can with out any trouble. One weekend I went to get my can and the fuel was spoiled. It has turned a tan color and has lost its smell. It was about 3 months old. The car that has that fuel in it will not run now. I have a suspision it is the fuel. It isn't gummed up, just discolored and doen't smell right. I think it might be the blend or the temperature that does it. I have also run airplanes that have sat for several years and the avgas has been OK.
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  #15  
Old 12-19-2011, 07:57 PM
DaAV8R DaAV8R is offline
 
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Default 100LL

Quote:
Originally Posted by LifeofReiley View Post
The true being known, 100LL IMHO will cause ill effect after a year of storage. Will it work and still burn, yes... but it does cause some havac.
Such as? Did you have a bad experience with some old 100LL? I have a terrible time using auto fuel with alcohol in my small engines. It seems to tarnish and plug up the low speed jet after about 3 months. I've never had a problem with 100LL, even after extended periods. Just curious.
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  #16  
Old 12-19-2011, 08:12 PM
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LifeofReiley LifeofReiley is offline
 
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Quote:
Originally Posted by DaAV8R View Post
Such as? Did you have a bad experience with some old 100LL? I have a terrible time using auto fuel with alcohol in my small engines. It seems to tarnish and plug up the low speed jet after about 3 months. I've never had a problem with 100LL, even after extended periods. Just curious.
Yes, a few times... had a 210 sitting with fresh fuel for 9-10 months, backfired and carried on until we added 30 gallons of new fuel. Made a heck of a difference.
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  #17  
Old 12-19-2011, 08:20 PM
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Saw a Cherokee 140 fly last year that had fuel from the late 90s. The tank was down less than a gallon, mechanic couldn't find anything wrong with it, and it ran great. So it seems like ten years is a better estimate. Fuel companies would rather you bought new stuff every few months, however. Auto gas absolutely will not keep anywhere near that long. I have heard a wild rumor that some people keep 100LL in their back-up generators and such.

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  #18  
Old 12-19-2011, 09:17 PM
Joe Hine Joe Hine is offline
 
Join Date: Jan 2005
Location: Douglas New Brunswick, Canada
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Default Life of 100LL

There was an episode of Ice Pilots this year where they were putting a DC4 back in service that had sat for three years I think. After doing all the maintenance, they couldn't get it to start. They drained the fuel and pored some on the tarmac (cement) and tried to light it, and it would not light off. Put fresh fuel in the tanks and the AC started. I do know that some avgas in fuel dumps in the north is a number of years old however, and is used w/o problem.

My own experience is, that the field where my 4 is kept is not useable in the winter, I fill the tanks with 100LL, usually in November and usually don't fly again until April. Never had a problem.

Joe
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  #19  
Old 12-20-2011, 05:18 AM
daviid daviid is offline
 
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Location: Plainville, CT
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as long as your tank is sealed and there are no leaks in the system you should be okay. once you have a leak the hydrocarbons inside will leak out. if you have ever opened a drum of fuel and the rush of gas coming out, you will know what im talking about.

the bigger problem is usually your states Dept of Weight & Measures (or whoever handles this task) will want to verify your pumps output every so often (usually once a year). and some if not all states want a permit for every pump.
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  #20  
Old 12-20-2011, 03:06 PM
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Lan Vinh Do Lan Vinh Do is offline
 
Join Date: Nov 2007
Location: moncton NB
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Default Thank you

Thank you everybody for all your help. It is really usefull.
I will see if we are enough to burn 30 to 40 000 litre per year and if yes, i will buy a tank. Like this the tank will be refill each 6 month. Like this we can pay 45 to 55 cent less each litre here ( they make 2 $ of profit each gal here )
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