I have a 2015 f150 with a 23 gallon tank and trying to take the cheap way out.
Has anyone plumed in a fuel transfer tank from the bed.
Or wont it work since there really isn't a fuel cap and it will leak out?

 

My neighbor installed one, but it was for diesel. Most aux fuel tanks are not rated for gasoline, keep that in mind when searching for your tank. That's all the advice I can offer.

 

I agree, gas is tough to get because it’s more explosive.

 

I’m sure that liability is a big reason why there aren’t very many bed mounted transfer tanks. Then there is the insurance aspect of it. Seems like a good reason to deny a claim.

 

By the time you add up the cost of an aftermarket tank. Loss of fuel economy from hauling all the extra weight, the time to install and plum you'd be better off buying a new 36 gallon tank from Tasca. You might find a used one but most wrecking yards punch holes in the tanks of incoming cars.

 

You 'might' be able to use something like this:

http://titanfueltanks.com/products/s...d-tank-5040015

It's just trickier and harder to find aux tanks for gasoline. I think they need to be DOT approved for integration into your fuel system. Also, gasoline is much more flammable than diesel, so there are safety concerns when looking to use electric transfer pumps. Do your research. Call a couple of the companies that offer tanks approved for gasoline and see what they suggest.

If there was a factory option that held more fuel, that would probably be your best bet. The computer could probably be recalibrated to provide the correct fuel level and miles to empty calculations as well. You might need a different sending unit, so you'll want to get a quote for ALL items necessary for the swap-out.

 

Modern emission systems require a vacuum in the tank to control vapors. OBD also has "leak check" tests that run themselves at weird times (like 6 hours after turning off the vehicle, etc). It would be very hard to plumb in a second tank and meet all the vent/emission requirements. Hard, but maybe someone has done it?

 

You bought the truck you bought. This is one of those things that isn't worth the effort.