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Extended Range Tanks

1783 Views 7 Replies 4 Participants Last post by  hawkerpilot05
After reading the post concerning 5 gallon diesel containers - what about the aux fuel tanks. Not mentioning a specific brand but I've read that one of the reasons our Diesel fuel tanks are not metal is because the plastic doesn't weep as much, hence less water introduced into the fuel when the tank isn't full. So, how do those of you who have Aux tanks (I don't know of any that are not metal) handle the water condensation when the tanks are not full? Which then begs the next question, if kept full (or even partially full) how do you keep the fuel from becoming stale?
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I run a 100 gal aluminum tank in the bed, it's off an International straight frame. I have used this tank in my 03 then 04 and now 07 truck and have never had an issue. BUT, these trucks are are not 6.7L fuel systems so I can't tell you if it condenses enough to present a problem in a 6.7L.

Regarding stale fuel, if your letting the fuel get stale, you probably don't need the tank. I do a fair amount of long haul with mine so it gets used. If I'm going to be around town for a few weeks before the next trip, I try to leave it empty or close to empty. I have never had a problem ( at least so far) with condensation/water in the fuel. I change my filters about every 15K miles, that's it.

If the tank is steel, that is a whole different want to keep a steel tank full as much as possible.

Another note on stale fuel, it happens but not always with dire consequences. I parked the truck for a year and half and the main tank was 3/4 full. When I put the truck back on the road, the fuel burned off just fine.

Here's the tank I'm talkiing about:

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I've heard about the diesel growing and requiring treatment but I have never experienced it in a couple million KM's of driving Super Dutys. Either I have been very fortunate or maybe the climate has to be a lot hotter on a long term basis with high humidity or something than we experience here futher north, I don't know.

For 30 or 40 gal on the occasional basis, I would be tempted to buy/build a decent cabinet that can be strapped/bolted into the truck temporarily that would hold half a dozen 5 gallon cans.
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