I know some of you are using auxillary fuel tanks but I wanted to throw in my take. I ordered the RDS 72743PC
http://www.rdsaluminum.com/auto-auxiliary.html . I installed it in under 2 hours using the installation kit. I chose the black one because it blends in with the bedliner. It also sits below the bedrails and isn't very noticable from a few feet away. It looks like a truck box and not a fuel tank so I hope that is a little deterrent for any would be fuel thieves. I used it towing for the first time this weekend and I am overwhelmed with happiness. I didn't need to search for a fuel station that I could fit into. As a matter of fact, I didn't need fuel for the entire weekend. I can't believe I've been towing all these years and just now invested in one.
