300 gallon fuel tank?

The size of your tanks doesn't effect your mpg. It can be kind of nice like I drove a truck with twin 250's for awhile doing local and only had to fuel once a week where others had to fuel every day. Of course extra weight involved.

I have twin 120 gallon tanks and considering switching to one and closing the other one off. Reason, I generally fuel once per day to get that shower anyways and it would help me stay lighter while tracking fuel mileage by filling to the top each time.

 

remember, fuel has a weight increase.

 

well, the truck I am driving now I average 7.3 mpg, so 100 gallons gets me 730 miles on average. generally more than enough for a day for me. The truck I had with twin 250's got about 6.1 IIRC. you can never completely fill a tank, and never run it completely dry. So even with twin 250's you are looking at about 400 gallon fillups x 6.1 = 2440 miles.

 

I dunno, my tanks don't level right (common problem with International) and my truck has 870,000 so probly time to replace fuel lines, check valves, lifter pump, etc... part of the reason I want to just run off of one. make all that cheaper and I don't think it would be a problem for me to run off of one.

But I can see where a guy might like to have bigger tanks too. find the cheap stops and save time fueling everyday.

 

I have 130 tanks, but as mentioned you can't run too low or it whirlpools and draws air and you can never completely fill. So yes, I would be limited to about 100 gal fill ups. It would be rare for me to have to fuel more than once a day. very rare. those days are way behind me friend ! (-;