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 beast....you 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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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 beast....you 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:
