Small gas tank beef

Sticker for my Ram 2500 said it had upgraded the 27 gallon to a 32 gallon tank as part of Snow Chief group. I ran it all the way empty once, needle was below the red mark, computer wouldn't even estimate range.

Stopped at Shell to fuel up, what did it take? 26 gallons and change. Does that mean I have a 27 gallon tank, or is there 5 gallons of "reserve" the computer and gauge don't know about?

My MPG is 10, on a full tank, computer estimated range? 270 miles - maybe the dealer forgot to tell the computer about the larger tank?

As you get older stopping every 2 to 3 hours becomes a necessity and you will begin to appreciate the smaller fuel tanks...

My Chevy with a 6.0 only has a 26 gallon tank, I start looking for gas around 175 miles, which is 2.5 hours or so. About that time I'm ready to stretch my legs, and take a leak.

I used to have an F150 with dual tanks, and it was geared tall. It would go over 500 miles between fill ups.

Just think what it's like with an F350 pulling a 25,000 lb trailer. 25 gallon tank and I was getting 6 mpg going from Des Moines Iowa to Great Falls MT fighting the wind.
Torque to pull a house and fuel tank to give you a 100 mile range.