I am going to parking my truck for a couple of months. Should I fill the fuel tanks or leave them close to empty?

 

You could fill them up then there is a lesser chance of condensation. I have left mine for months with empty tanks and haven't seen any issues EVER. So you would be just fine the way it is

 

What do you think fuel prices are going to do? It might be cheaper to top them up now then later....

Honestly though, it shouldn't matter either way.

 

If this ends up being something like I'm planning on parking it for a couple of months and it turns into longer than that, you might want to leave it empty. Fuel can go bad after a while.

 

I would still run the engine once in a while, when I left back to iraq, I left like a 1/4 tank in the front and the rear @ 1/8 tank just so they could run it once or twice a month for a few minutes.

 

When my motorhome goes for winter storage, I top up everything, gas, diesel and propane.

To prevent condensation, but I know alot of people who store there machines empty and nothing has ever happened.

 

I stored it with half a tank the first tiem I left for Iraq. Nothing seemed to hurt it any.

 

Maybe this is a stupid question, but where is all this condensation supposed to come from?
Its not like we have a tank sitting wide open in the middle of a field. For the most part, the tank is a closed unit, with a breather in the gas cap, and a small vent. I don't see that causing a hell of a lot of air flow. And without air flow, you're not going to get much, if any, condensation. Am I missing something?

 

Thanks for all the responses. If it doesn't matter either way, I think I will top the tanks off since diesel won't be cheaper in the next couple of months.
How long will diesel last in my tanks before it goes bad. Can you add a stabilizer like you can with gasoline?

 

I'm still burning off a fuel load from October.

 

Diesel will last for ever if well kepted and sealed.

 

We scrapped a semi out last year, and I got 50 gallons of free fuel out of it that had to be AT LEAST 3 years old and it burned just fine in my truck. I wouldnt be too concerned