OK I went and looked and here is what my truck has done, it avraged 11.9mpg over 93,000 miles. It's a 2011 F250 SRW CC SB 4X4 Lariat. It's a mix of towing city and freeway.
Mark

 

Thanks further confirmation that I am not far off. Much appreciated!

 

 

I have a 2014 and stock tires and 3.73 gears srw I was averaging 11.5 sometimes 12, I weighed my pickup with my flatbed and gear it was 8500. I just recently put on 33's and am getting around 10.5 to 11 but I'm also just not caring and running the throttle how I want

 

I was hoping Tarster would show up with his info as he has the heavy flatbed too. Good to hear from you!

 

Haha you bet, from my research the flatbed should be about 1500lbs and the stock bed should weight roughly 400lbs.

 

So I can assume my rig weights around 8,700 to 9,000 lbs? I am basing that off Fords listing my cab and chassis as being 7,222 lbs without a bed and adding 1,500 ish lbs.

 

Absolutely, I'd say with fuel, any gear you carry, and you sitting in it, your over 9k pretty easy.

 

Probably a fair assumption, most flatbed manufacturers will list what the bed weighs by its self, of course you can always find a scale and know for sure how much it weighs.

 

The best advise is to not pay attention to the mpg's just drive it like you want and fuel it up when it needs it, that's what I do and it is so much more enjoyable to me. I can squeak out an extra mpg out of a tank of fuel if I try, but I don't want to drive like there is an egg between my foot and the pedal for an extra mpg. With gas being around $2.30 where I live 1 extra mpg equates to about $6.00 in savings per tank (34 gallon tank) which averages out to less than $5 a week for me. Not worth the effort.

 

Correct me if I'm wrong, but I think you can take you GVWR weight class and subtract your payload rating to get your curb weight (at least before adding your flatbed). My F250 is 10k lb class 2 less 3137 lb payload = 6863 lbs. Might give you a little more accurate number. Just saying because mine's a little heavier than what Ford shows as a base or 6695 lbs for my long bed 4x4 crew.

 

This can't be right. I have the 10k package, my payload is less than yours(I think 2,9xx lbs). This would mean my short bed crew XL weights more than your long bed. I can see your reasoning though.

 

Got to love aluminum. Mine's a 2017.

 

I didn't think of that, but I do not think the super dutys lost any weight. They added it back in down low.

 

This surprises me. The base curb weight on a 2016 crew 4x4 sb is 6828 lbs, 133 lbs more than the 2018 long bed (I'm assuming the 2017 is the same).

https://www.fleet.ford.com/truckbbas/topics/2016/16_SD_Pickups_SB_Updates.pdf

https://www.ford.com/trucks/super-duty/models/f250-xl/