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Old 09-14-2016, 12:01 PM   #1
3 Rivet Member
1991 35' Airstream 350
Windsor , North Carolina
Join Date: Oct 2005
Posts: 211
Images: 4
Fuel scrubbing?

Been working on the 350LE. Now that the fuel gage works, I find that I have almost a full tank of gas, which has been sitting for 6-7 YEARS. Why it has been parked for that long is, well, a long story. I have several questions--

Can anyone tell me the gas tank capacity? I cannot remember.

Do I dare trying to use this fuel? I do not remember if I put fuel stabilizer in it when it was parked. I have no easy way to inspect it to see if it has begun to turn to varnish.

Has anyone had any experience with having fuel scrubbed, tank cleaned, etc.? I know this is relatively common on boats, but one of the companies I called has told me that they have never done a RV--and they might have to take the tank out to get it cleaned--surely difficult with close to 500 lbs of fuel in it.

Best to all,
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Old 09-14-2016, 01:40 PM   #2
Rivet Master
1974 31' Sovereign
1979 23' Safari
Wayland , New York
Join Date: Jan 2012
Posts: 1,632
Images: 3
You'll probably have to siphon the gas out of the tank then drop it to clean it out. 6-7 year old gas, even with fuel stabilizer=no good. Since it probably had ethanol in it it probably absorbed some water so you may have some corrosion in there too.
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Old 09-15-2016, 10:12 AM   #3
2 Rivet Member
1979 28' Airstream Excella 28
Albuquerque , New Mexico
Join Date: Aug 2016
Posts: 65
I have diesel, and drained about 20 gallons from a 1/4 drive nut under the tank.

For old gasoline, I have had good luck with a fuel stabilizer and sea foam
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