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12-19-2011, 06:54 AM
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Join Date: Sep 2006
Location: Defiance, MO
Posts: 1,674
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Quote:
Originally Posted by RV6_flyer
Article was written by a Shell Engineer.
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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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Philip
RV-6A - 14+ years, 950+ hours
Based at 1H0 (Creve Coeur)
Paid dues yearly since 2007
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12-19-2011, 07:11 PM
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Join Date: May 2005
Posts: 377
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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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Charlie "T.Bear" Guarino
Springtown, TX
RV-4 Flying again with a fresh overhaul
Exempt but paid
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12-19-2011, 07:27 PM
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Join Date: Jan 2005
Location: Round Rock, TX
Posts: 3,778
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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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Reiley
Retired N622DR - Serial #V7A1467
VAF# 671
Repeat Offender / Race 007
Friend of the RV-1
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12-19-2011, 07:36 PM
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Join Date: Apr 2007
Location: Cedar Hill, Tx.
Posts: 159
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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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member 1 of 6
Metal Feathers Club
RV 7 N706CB
1st flight Oct 18, 08
S/N 72847 tip 200HP CS glass IFR
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12-19-2011, 07:57 PM
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Join Date: Jul 2009
Location: Lee's Summit, MO
Posts: 747
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100LL
Quote:
Originally Posted by LifeofReiley
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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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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Robert Williams
Lee's Summit, MO
RV-8 - Empennage & Wings Done
Working on Fuse
O-360-A1A
1946 Cessna 120
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12-19-2011, 08:12 PM
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Join Date: Jan 2005
Location: Round Rock, TX
Posts: 3,778
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Quote:
Originally Posted by DaAV8R
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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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.
__________________
Reiley
Retired N622DR - Serial #V7A1467
VAF# 671
Repeat Offender / Race 007
Friend of the RV-1
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12-19-2011, 08:20 PM
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Join Date: Jan 2005
Location: Near Scipio, in Southern Indiana
Posts: 1,779
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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.
Bob
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Bob Kelly, Scipio, Indiana
Tech Counselor
Founder, Eagle's Nest Projects
President, AviationNation, Inc
RV-9A N908BL, Flying
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12-19-2011, 09:17 PM
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Join Date: Jan 2005
Location: Douglas New Brunswick, Canada
Posts: 121
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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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12-20-2011, 05:18 AM
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Join Date: Jan 2010
Location: Plainville, CT
Posts: 104
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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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12-20-2011, 03:06 PM
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Join Date: Nov 2007
Location: moncton NB
Posts: 225
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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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