I can't guess but if you use the following map (zoom in for prices) for your route you can save quite a bit of $$ by picking which stations to stop at over the course of your trip. Planning ahead is the easiest but if you have internet access while driving you can do it then. We use a laptop, much easier to see.
The map work I do before a trip is mostly in finding the flattest route - I find that fuel prices don't vary as much as grades do and a mountain route or dense traffic have a larger impact than price per gallon.
Example doing a Phoenix-Seattle run there are four reliable year round routes a heavy truck can expect and the most fuel efficient one is the flattest one - on our class 6 truck there's better than a $150 difference in fuel receipts compared with the next best. Unfortunately weather plays a role, if it's deep winter the slow boat through California is the only guaranteed open way and that adds hours. Fuel price through CA does play a bigger factor. In theory the 55mph speed limit for trucks should save fuel but in practice it doesn't work because traffic density has you losing and reclaiming speed constantly for at least half of the state, and the grades near the top and bottom of the state eat what's left of what might have been saved.
Going to be getting a 30 foot overall length travel trailer. I have a 16 ram mega cab 2500 w/ 4:10 gears and 6.4L I am towing from Haines Alaska to Portsmouth Virginia. Is there anyone that could even help me guess what I may see for fuel mileage, and any tips would be welcomed as well.
You know this already but just reminder for the audience.. make sure all your tire changing tools, jack, spare, compressor, plugs are all well in order! That can be one of the biggest time wasters on those kind of hauls and there's nothing economical about road service.
