The 26 gallon tank is designed to read empty with a 6 gal reserve. That is why you can only put 20 gals in unless you've dipped into the reserve.

 

Good way to get all kinds of sediment trapped on your filter sock and burn up your pump. gasoline cools the fuel pumps. Running super low constantly burns them up.
Some guys don't believe this, but I have Yet to replace a fuel pump ever! Must be a reason.
My cousin drives his car below 1/8 tank regularly. he's replaced a fuel pump in almost every car he's owned.

i have owned 20 something Used cars. This truck is the first new vehicle i have ever purchased just so ya know I'm not comparing new cars to old one's.

 

One question about the gauges. Couple years ago I have a 2002 BMW 525i (BMW NEVER AGAIN!!!) there was a console test. You have to click a function in portable computer and the gauges go crazy. Can I do that in my 02 dodge? To check if the fuel gauge is right?

 

I have 02 5.9 and ive never had to put more than 22 gal in, and that was when i prob 15 miles after the light came on. so id say the 6 gal reserve is prob correct

 

Okay. I think you guys answear my question. Looks like everything is okay with my tank.

Thanks