Good Sam Club Open Roads Forum: Length of time diesel fuel stays good in tank
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Open Roads Forum  >  Class A Motorhomes  >  Maintenance Issues & Tips

 > Length of time diesel fuel stays good in tank

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Johnny G1

Clearwater, British Columbia ,Canada

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Posted: 06/20/20 12:16pm Link  |  Quote  |  Print  |  Notify Moderator

My MH has sat for 3 1/2 yrs now and just fired up last week, still has 70 gallons of fuel since sept 2016, didn't turn over twice and was running like a watch.


98 Mountain Aire 34' 210 Cummins Puller and 2001 dodge dully with all the toy's, 400 + hp pullin a 28' 5th wheel Travel Aire. Lots of fun.

1320Fastback

Vista, Ca

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Posted: 06/20/20 01:14pm Link  |  Quote  |  Print  |  Notify Moderator

On job sites our will sit for months between phases in tanks that are freely vented. Our machines are all brand new with hundreds of sensors and whatnot and they have no problems with the fuel.


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Ivylog

Blairsville, GA and WPB, FL.

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Posted: 06/20/20 03:45pm Link  |  Quote  |  Print  |  Notify Moderator

At 10 years I’d start to worry.


This post is my opinion (free advice). It is not intended to influence anyone's judgment nor do I advocate anyone do what I propose.

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KD4UPL

Swoope, VA

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Posted: 06/20/20 05:04pm Link  |  Quote  |  Print  |  Notify Moderator

Some of the fuel in my Kohler diesel generator is well over 3 years old. I did put some biocide in it. It runs just fine.

wagonmaster2

northcentral oklahoma

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Posted: 06/20/20 08:18pm Link  |  Quote  |  Print  |  Notify Moderator

Thanks for all the replys Guys. Makes me feel much better now. Will try to burn up a little but will take lots of short drives to burn up 90 gal at 7.5 MPG.

mowermech

Billings, MT

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Posted: 06/22/20 07:04am Link  |  Quote  |  Print  |  Notify Moderator

Just make sure your tank is completely full to avoid condensation.
Diesel fuel does not "rot" like gasoline (new or old), so Sta-Bil or Sea Foam is not required. If there is no water in the tank, a biocide is not needed. The algae will only grow at the water/fuel interface; no water, no algae.
However, if you want to put "stuff" in your tank, go ahead. It probably won't accomplish much, but it won't hurt anything, either. It would be a good idea, IMO, to read the Material Safety Data Sheet (MSDS) for the "stuff" to see exactly what is in it. Many such products consist of mostly acetone, with a little light machine oil and isopropyl alcohol. In fact, there is a website that tells you how to make your own home-brew diesel fuel treatment for about $3 a gallon!


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