Not claiming its the rule, but I looked at 2 crew cab 4x4 F-250s last weekend at the same dealer. Both same year model both same trim package and cab/bed configuration both like new, the diesel had 40k miles the 6.2 gas had 30k miles and they were asking right at $3000 more for the diesel.

For fuel mileage, it looks like the diesel in over all average gets about 15% better mpg's. Diesel generally runs about 10-15% higher than gas in my area.

What is "heavy"? The 6.7 diesel F250 pulls a 12,000+ pound 31' travel trailer so easily, I could forget it was back there, truly. My wife's F250 gasser required a heavier foot to make a heavy trailer move.

Asking and getting are very different numbers in selling and buying a truck. kbb.com is a pretty good yardstick, ebay is even better. Check the completed sales for prices.

Identically equipped trucks with only the difference in engines, diesel costs about $7,000 after tax (on a Ford) more when new than the exact model with gas. That difference or more is covered on the back end in retained value.

The last one I traded in was a 2011 F250 Lariat Crew Cab 4wd, with just shy of 150,000 miles, a bent frame and the front end needing a few parts replaced from an unfortunate encounter with hole in the middle of a field. The dealer was aware of the issues. I gave that truck and $26,000 bottom line out the door for a brand new one with more options and an extended warranty. Real price with the add-ons and tax was in the low $50's, so the tradein value was in the upper $20's. My wife had a gas F250 2WD with less than a 100,000 on it and the used retail value was only about $12,000, in the same year. The aftermarket demand is much stronger for the diesels. Her gasser, which was a 2WD, was 12 - 14 mpg real world on the highway without a trailer, but a load in the bed. Mine was a 4wd Crew Cab and legitimately 17 - 18 mpg on the highway at 70 mph around the Hill Country with a load in the bed. The dollars and cents difference in fuel consumption is one thing to consider, but also the reality of distance between fuel stations in the West is another potentially important factor. I was pulling a 31' travel trailer, which drops mileage down to about 10 - 11 mpg on the diesel, and 8 with the gas, and then fuel range really begins to matter in a huge way out west or some areas of South Texas.

One minor detail, my last one was a 3.31 ratio and pulled the travel trailer without any effort. My current is a 3.55, and the mileage is a touch lower and nothing really gained. The next one will be a 3.31 again. If you are pulling bulldozers, then that is a different issue, but for a travel trailer and highway driving, the extra 1+ mpg with the 3.31 was nice.

The negatives on the diesel are higher maintenance costs and lower reliability. An oil change is $76 every 5,000 miles for off pavement use, or 7,500 for mostly highway use, and some places charge $100. Fuel filters need to be changed every 15,000 miles. Dust can cause real problems on a diesel if the air and fuel filters are not maintained regularly. The gas engine is pretty well trouble free and only requires minimal maintenance. The other negative for off pavement is the diesel weighs a lot more and so is not as good on soft ground. If you go off pavement, and especially pull a trailer off pavement, definitely buy 4wd. I've watched a few folks spinning wheels trying to pull a trailer up wet dirt inclines with 2wd.

If you are buying used, then buying a gasser might make sense as you should be able to buy one a substantially lesser cost than a comparable diesel. Watch ebay. I bought my wife's last truck off of there with 81 miles and more than $10,000 below the best quote of any dealer in the Austin, Houston, or Dallas area including fleet pricing. It had some very minor hail damage in transit to the dealer's lot, (less than $500 to fix) so they sold it off on ebay and it still had all of the original stickers on it. We picked it up from a wholesale auction lot somewhere in the vastness of the DFW complex, even though the dealer was in Kansas. It did not have all of the dealer prep and shine, but for $10,000 bucks, I'll pull off the plastic and wash it myself.

Let me re-iterate, if you are looking at vehicles, watch ebay. Used cars are a dealer's highest profit margin item, service is next, and new car sales are just to draw in customers so they can buy used cars and sell service.

Thanks JeffBird. Useful info.

You're welcome.

I agree with everything jeffbird said, great post!

Keep in mind redchebby's numbers are stock. You should expect at least 3mpg increase if you delete all the EPA trash on the 6.7.

Also keep in mind by deleting you are breaking the law, you are jeopardizing whatever warranty you have, deletes are not free.

I HAVE A 2012 6.7 DIESEL NOW PULING A 31 FT 5 TH WHEEL 11,500 LBS THINKING ABOUT GETTING A 6.2 GAS WITH 373 GEAR BUYING USED A 2017 WILL IT PULL 5 WHEEL.

You’ll be disappointed after pulling with 6.7 powerstroke

I went from a 2008 6.7 Cummins with 3.73 gears to a 2015 6.4 Hemi with 3.73 gears. I pull a 35 ft. Rockwood Signature Ultra Lite with it. There was some noticeable difference in the two. We pulled the trailer to Delaware last summer and it was fine. The motor is designed to go to the higher rpms on hills. Our dealer in Bonham said "let it wind up, it's supposed to" and he was right. It did so without losing much going through Tennessee and it went up most hills at 60-65mph. The mileage was around 8-9 mpg most of the time. It gets around 12-14 mpg the rest of the time. We have put 73K miles on it. The maintenance is way way cheaper. But, YMMV....

THANKS FOR THE INFORMATION I GOT A 2007 5.9 DIESEL FROM BONHAM NEVER WENT YO THE SHOP THIS FORD 6.7 BEEN 7 TIMES TO DEALER THE DODGE WAS BEFORE DEF ON ENGINES WARRENTY RUNNING OUT SOON ON FORD PROBELY GOING BACK TO GAS THINKING LOOKING A DODGES AGAIN ALSO. I REALLY LIKE THE FORD TRUCKS BETTER BUT DONT WANT TO DEAL WITH REPAIRS THAT WHY LOOKING HARD A 6.2 FORD AND 6.4 DODGE.

I would say this is pretty accurate...where did you find it? its neat

legalities aside I didn't feel like it was worth paying the $3500 to delete mine.


its fine, nice and quiet. the DEF sucks but not enough to cough up $3500.

Screen shots of a website called fuelly. It is an online database of people who log their fuel mileage on dang near every vehicle imaginable. Just google it and you will find it.

To me if you are going to own it for the long haul then it makes sense to delete it as the cost to replace the scr/dpf/etc. will be as much or more than the cost to delete and you will get a little better economy and potential for more power and longevity.

On the other hand if your going to drive it for 100k and get into a new truck again I don't think it makes much sense.