I have never really checked, but seems to drive a while before needing fuel!

 

Some of them have 38 gallon tanks bud... even with poor mileage it'd be a while before fillup LOL.

I'm loving my TDI now... 14 gallon tank... usually get at least 600 miles before needing fillup!!

 

Well I picked up a 03 Excursion 4x4 6.0L 230K all stock and on the way home with cruise set at 70 I got in the low 20 mpg's. I thought the read out was wrong but went about 200 miles burning a 1/4 of my 44 gallon tank so it wasn't too far off. Around town and mixed driving I get in the teens but the highway mileage exceeded my expectations so I'm really happy.

 

Not sure if this is possible, but I think I have a 25gal tank?

 

My 07 F350 long bed 3:73 on 35's would easily do 18-19 on the hwy.
My 04 dually with 4:11 on factory tires gets less maybe 14-15 hwy.
I sure hope the 6.7 does better when it comes in.