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Oct 20, 2011 | 06:26 PM

#16

galaxie641

Postmaster

Joined: Nov 2006

Posts: 4,517

Likes: 3

From: SE Wyoming

In San Jose I'd say never, we should already be starting to get it here.

Oct 21, 2011 | 07:32 AM

#17

BROWN DOG KTM

Fleet Mechanic

Joined: Oct 2011

Posts: 1,778

Likes: 287

From: Down SOUTH

Quote:

Originally Posted by sdetweil

Best distance I got this summer was 303 miles, 34.354 gallons to fill on a 38 gal tank...
Sam

Does my 2008 F350 4x4 CC SRW 8' bed have a 38gal tank ??

Oct 21, 2011 | 07:50 AM

#18

ljutic ss

Posting Guru

Joined: Apr 2008

Posts: 2,392

Likes: 1

From: Green Lane, Pa.

Quote:

Originally Posted by BROWN DOG KTM

Does my 2008 F350 4x4 CC SRW 8' bed have a 38gal tank ??

Yes, it's a 38 gal. tank.

Oct 21, 2011 | 10:01 AM

#19

jimnv

Freshman User

Joined: Feb 2009

Posts: 48

Likes: 0

The best most honest MPG I've ever attained on my 08 SRW 4X4 Super crew 3.73 rear end, was about 20 MPG. I was traveling 125 miles, at night, no wind, freeway. Elevations from 4000 to 6000 feet, rolling terrain. I think I had kept my RPMs to about 1900. Like Senix, I play at keeping the boost as low as practical. I had about 20K miles on it at the time.

I am getting about 16 to 17 typically. I try not to jackrabbit start and ease into speed when I can. If I am approaching stop lights, I do the best I can (without pissing off my fellow livestock) to hit them green or at least let others trip them to green for me. Getting trucks as big as these rolling from a dead stop sucks fuel like crazy.

Towing is completely different though. I haven't really found that "zone" for pulling my RV and getting anything to brag about. I am in there about 9 MPG average going about 65 MPH. Probably typical.

Oct 23, 2011 | 03:21 PM

#20

OAGES

Mountain Pass

Joined: Oct 2003

Posts: 126

Likes: 0

a few months ago I would easily hand calculate 16mpg on my 2010 F-250 CC/SB 4x4 with 3.55 gears (even as high as 18mpg driving nice). Two weeks ago I drove 196 miles on flat terrain with only a few stop signs along the way. I folded in the mirrors, never used cruise, kept it under 60mph and kept the boost below 10psi when possible. I filled up when I got to my destination and only got 13.7mpg hand calculated. I left my house at 4am and there was no wind. On the way home I drove like I normally would and got 12.4 hand calculated. I don't understand why I would lose 25% of my fuel economy. The fuel filter was changed shortly after I noticed the drop in MPG thinking that was the problem. I also started using Ford's Cetane Boost which has not helped the MPG. I have started writing down my regen mileage and it has varied between 85-220 miles between regens mostly driving empty. Seems to be something wrong with the truck, but the dealer says "no codes, no problems". Anyone experience a drop in mileage like this???

Oct 23, 2011 | 03:24 PM

#21

senix

Super Moderator

Joined: Aug 2008

Posts: 37,383

Likes: 1,867

From: Frederick, MD

when I did there was a hidden code in the history. Had to do with an overboost situation.

Oct 23, 2011 | 04:24 PM

#22

slowmans

Cargo Master

Joined: Jan 2006

Posts: 3,011

Likes: 90

From: SE. MA

Quote:

Originally Posted by OAGES

how many miles do you have? when was the last time you changed your air filer?

Oct 23, 2011 | 04:36 PM

#23

OAGES

Mountain Pass

Joined: Oct 2003

Posts: 126

Likes: 0

Quote:

Originally Posted by senix

when I did there was a hidden code in the history. Had to do with an overboost situation.

I was hoping that code was going to be there.....but there was nothing. I did see the gauge pegged at 40, and was able to get a picture of it at 38, but the dealer didn't seem to think much about it

The truck has 62,000 miles and about 10K on the air filter

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Oct 23, 2011 | 06:03 PM

#24

senix

Super Moderator

Joined: Aug 2008

Posts: 37,383

Likes: 1,867

From: Frederick, MD

Quote:

Originally Posted by OAGES

My symtoms were not so much how much boost I could produce under load but rather when I was empty on country roads where I would normally see no boost or just a needles worth. In those cases I was producing 10-15psi.

Oct 23, 2011 | 06:50 PM

#25

ljutic ss

Posting Guru

Joined: Apr 2008

Posts: 2,392

Likes: 1

From: Green Lane, Pa.

Keep in mind that certain area's of the country have already seen sub freezing temps and winterized fuel is being pumped now. The winterize fuel will effect your mileage.

Oct 29, 2011 | 08:35 PM

#26

BROWN DOG KTM

Fleet Mechanic

Joined: Oct 2011

Posts: 1,778

Likes: 287

From: Down SOUTH

Filled up today.
Drove 106.8 miles as easy as I could at 1900 rpm on interstate.
Refilled with 6.6 gals of fuel which equalled only 16.1 mpg on my 2008 F350 4x4 CC SRW 8ft bed.
So I'm kinda bummed.
My 1996 F350 7.3L manual trans will get 19.5 mpg so I'm kinda bummed !!!

Oct 30, 2011 | 07:59 AM

#27

StanleyZ

Logistics Pro

Joined: Nov 2001

Posts: 3,787

Likes: 102

From: Georgia

Quote:

Originally Posted by BROWN DOG KTM

You don't say what Rear Axle you have but probably 4.10 in that truck and 16 is certainly respectable. It's a big truck and 16 is right around where everyone else is. I drive like that most of the time and I'd take 16 in a heart beat. I don't drive enough empty interstate to bother checking it but I'm pretty sure mine would have come in around 14- 15. Now that I'm tuned it seems better but like I said I've not done a check unloaded.