Alright, heres the deal I was out hunting, ya know slow speeds for mile after mile of gravel, filled up and got 20.5mpg. I'm just feeding you guys a line but I was up in the ford vs Comp... forum and there was a guy on there saying his buddy gets over 17mpg with his V10, now that seems a bit high unless it was a 2wd, reg cab, reg box, 3.73 rear end with a tail wind driving 55mph. It did lead me however to wonder what the highest mileage you guys have seen and what type of conditions you were in????

A month after buying my truck me and my dad went on an antolope hunt that racked over 800 miles on my new truck. I was braggin about the economy on the way down and sure enough when we filled up the first time I was at 11.5mpg, needless to say my dad kinda gave me crap the rest of the trip, well that was untill we drove home!! once the trip was over and as we pulled into town I filled up for the last time except this time I made 15.67mpg!!!! He was quite impressed. the diference was on the way down we were in ahurry driveing 75mph and then 80mph (once on interstate) and bucked a strong 30mph headwind, this yielded my 11.5mpg. On the way back we had finished early and were in no hurry so I drove 70mph and 65mph which kept the Rs below 2000rpm. I was also real easy on it when accelerating and we had a 10-15mph side tail wind. this gave me my over 15mpgs.

I guess I'm just wondering what the highest ever mileage you guys have gotten and what the driving conditions were??? also if you truck isn't in your sig give a breif desc.

 

B4 my lift ,the best I had got was right on 15mpg. This was a long hwy trip driving 65.

 

Mine was about the same as Dukfvr.

Now I get 11 or so in day to day, 8-9 towing 4-5K trailer, and 14 or so on highway.

 

OK DUKFVR

I guess I mised all about your lift. Maybe you posted about it in the SuperDuty forum (I no longer hang out there, too many buttheads and arguments)

If you already bragged about the mod drop me a PM with the link to the thread.

I can make the computer on all my 2000-2005 Fords read very high under certain conditions. I can really get my truck to give over 25mpg for long enough that at a "top off" the manual calculation is over 21mpg. But if I average every tankfull over the entire 1600 mile trip then I am back to the typical 10-12.5mpg range.

It means nothing to me that for 250 miles of all down hill and good tail wind yields over 20mpg, eventually I hit the flats and rolling hills again and have to make the V10 work for a living, not just pump cold air into the cabin and keep the battery charged.

 

The best I've ever got was 14.8, driving 70-75 on the highway with up and down hills, that was before the mods. With the mods I have now, I'm down to about 9.2 on a trip with same conditions.

 

WOW, I heard a story this weekend about a Duramax that gets 20mpg @ 100km/h pulling a fifth AND a boat with trailer.

I get 12mpg while driving empty at 90km/h or 130, no difference. Now that I know that, there will be no more driving at 90.

 

Once I break the 2000rpm barrior my mileage drops a little below 12 weather I drive 75mph or 85mph, but if keep it under 70 (or 2k rpms) then mielage goes up 1.5-3mpg. Unfortunatly I rarely drive less than 70mph! It's usually 75-80mph and I swear everytime I go on a trip I have to buck the every day continuous ND wind. I think mother nature knows the sound of my truck and cranks up the wind just so I can actually see my gas gauge move as I drive, lol.

 

JFYI; yeti, I get about 7-9 towing my camper and boat together, although I'm never easy on it and I refuse to drop speed to go up hills so if it takes 4200rpm to get me to the top at 65, so be it, the extra money in fuel is well worth the BSEGs I get from keeping up with cars on the same hill!!!! I would probably have call to BS on 20mpg though unless it was a matchbox boat and camper, lol.

 

I gave up on "Calling BS"... it doesn't work. I use it as a way to learn about Human Behavior...and it is scary!!!!!

 

05 F250 V10 4x4

10 MPG....Drops to 9 towing.

Even solo on the highway @65 it is a solid 10mpg.

 

The best I ever did was 15mpg. I usually get in the 13-14 range. I can get 10 to 11 no matter what I'm towing, it's the same almost regardless of weight. With a camper, boat and 25mph headwind, once I got 9.

 

The best I ever got was 16.5MPG ... with a cab height cap/topper, towing a very small motorcycle trailer w/bike.

235/85r16 tires, pumped way up.

And, this was the return trip home, and I had gotten flung over the handlbars at 45MPH and blew my right shoulder - thankfully I have an automatic

Anyway, the entire trip was 60MPH or maybe 65 at the most. Straight through, minimal toll acceleration (hurt too much), etc.

See my sig for particulars of my '01

 

Don't ask how, but my '99 V10 was getting 13 city at the FL beach, but in TN I found 11-12 the normal range. The V10 is a great engine in my book, I only swapped over to a PSD due to my business venture.

 

Well, I have finally finished some mileage testing with my beast, and here is how it runs out:

driving no load taking it easy as possibly with no hammer time

11.5 mpg the best I can do.

driving no load hammer time the whole time

9.5 mpg

the result: too much fun to worry about 2 mpg!!!

When I towed last weekend about 7k# I got about 7.5 at 85 on the freeway between phoenix, and sierra vista. I was haulin' *** the whole way

Scott

 

02 F-350 crewcab dually 4.30

11 1/2 - 12 solo

8 1/2 - 9 towing 13000lb.+ 5er

Gross combined at 20000 lbs.