Average mileage after sum mods
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Senior User
Joined: Apr 2010
Posts: 317
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From: Bismarck,ND
Average mileage after sum mods
Hey guys i have been mostly in the 7.3l form and others, and have been thinking on getting the 6.4l. The only reason i dont want one is the same reason my bro, and many others got rid of his,and thats the bad mileage. I heard that with the dpfe delete and the right tuner that its not a problem anymore. Is this true for the norm, or is that just a few lucky people. Any insight on the typical mileage u guys are getting and is there a better 6.4l to get 08-10 as far as year goes. Thanks in advance.
Hotshot
Joined: Nov 2000
Posts: 11,591
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From: Pflugerville, tx
I have an 08 6.4 dually. love it for pulling my truck to shows. (yours looks nice too!)..
I get about 9mpg towing.. 12-14 the rest of the time, depending on my foot and traffic.
I put a tuner on (Spartan) earlier this year and got 1.5 mpg increase.. but experienced some weird sounds and feel we couldn't recreate without the tuner.. so its back off..
you will NOT get 20mpg, EVER.. with a 6.4
now.. a 6.7 (2011 and up) might in a SRW, 3.31 rear.. (not towing of course), some folks have turned in some amazing numbers. see the 6.7 forum section.
25% improvement over stock is still the exception
6.4l is 2008-2010 only.
Sam
I get about 9mpg towing.. 12-14 the rest of the time, depending on my foot and traffic.
I put a tuner on (Spartan) earlier this year and got 1.5 mpg increase.. but experienced some weird sounds and feel we couldn't recreate without the tuner.. so its back off..
you will NOT get 20mpg, EVER.. with a 6.4
now.. a 6.7 (2011 and up) might in a SRW, 3.31 rear.. (not towing of course), some folks have turned in some amazing numbers. see the 6.7 forum section.
25% improvement over stock is still the exception
6.4l is 2008-2010 only.
Sam
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Joined: Aug 2008
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From: Frederick, MD
Figure that you could tune the truck to get rid of the DPF and maybe a slight increase. Not worth the investment imho unless you are having an issue with the DPF.
Mine works perfectly for my style of use so I am happy with it.
With my SRW and 3.73 gears I can get a consistent 16-17 mpgs on the hwy unloaded.
Mine works perfectly for my style of use so I am happy with it.
With my SRW and 3.73 gears I can get a consistent 16-17 mpgs on the hwy unloaded.
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Joined: Apr 2010
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From: Bismarck,ND
I wonder if it matters F350 or 250, because every time i see f250s getting the better mileage even with the same gears, its a little lighter but wouldnt think that would make that much difference?
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From: Frederick, MD
No difference in wt. Mine comes in at 8200 lbs with just me in the seat.
Gearing is a factor as well as break in.
When I first got my truck I did a run to Arizona. About 14 is all I could muster.
Then I hook at a heavy load and broke it in good.
Gearing is a factor as well as break in.
When I first got my truck I did a run to Arizona. About 14 is all I could muster.
Then I hook at a heavy load and broke it in good.
Laughing Gas
Joined: Feb 2007
Posts: 950
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From: Waco, Texas
Traveled to Colorado from Central Texas this summer. Traveled with some friends who have a 2011 and was pulling a 5er that came in at about 11k and mine about the same. I got average 9.7 and he got 9.8 towing. Empty, while we were in the Salida, Buena Vista area, I averaged 16, he averaged 17. As far as we could tell, not much difference. Now mind you, this was all hand calculated, did not use the lie-o-meter. They went one way, we went another while we were there. I probably did a little more climbing and backroads and I know more 4x than they did. But still, not much difference.
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From: Bismarck,ND
No difference in wt? as far as i know about 2k lbs or more. I know my 03 F350 was 9900 dry wt. and F250 was a little under 8k? I could be wrong. Never the less I personally dont know anyone that ever got more than 13, and where im from u could say pretty flat, but i guess the wind makes up for that.LOL
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Sorry to disagree here. I took a trip from San Diego to Ventura and back a couple weeks ago and got 20.3 with my F-450. Granted that was Spartan tuned, GearVendor OD and 60 MPH, but you did say "NOT" and "EVER".
I have no problem believing that a F-250 with the 3.55 gears could get 20+ with just DPF delete and tune...if you keep the speed down.
BTW, the Lie-O-Meter would like you to feel really good. It said 28.2 MPG when I got done.
I have no problem believing that a F-250 with the 3.55 gears could get 20+ with just DPF delete and tune...if you keep the speed down.
BTW, the Lie-O-Meter would like you to feel really good. It said 28.2 MPG when I got done.
Hotshot
Joined: Nov 2000
Posts: 11,591
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From: Pflugerville, tx
Sorry to disagree here. I took a trip from San Diego to Ventura and back a couple weeks ago and got 20.3 with my F-450. Granted that was Spartan tuned, GearVendor OD and 60 MPH, but you did say "NOT" and "EVER".
I have no problem believing that a F-250 with the 3.55 gears could get 20+ with just DPF delete and tune...if you keep the speed down.
BTW, the Lie-O-Meter would like you to feel really good. It said 28.2 MPG when I got done.
I have no problem believing that a F-250 with the 3.55 gears could get 20+ with just DPF delete and tune...if you keep the speed down.
BTW, the Lie-O-Meter would like you to feel really good. It said 28.2 MPG when I got done.
so what do you get towing?
Sam
Sam
Cargo Master
Joined: Jan 2006
Posts: 3,009
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From: SE. MA
I have 3.55's in my 350 and get roughly 16-17 mixed..... That's with innovatives street tune, I'm gonna run the x-street after I get the truck flashed Saturday..... Should do a little better with that tune?
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Joined: Mar 2006
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Towing my 18k 43 foot Toyhauler get 9-9.5 up from 7-7.5 pre delete and tune. Considering I rarely got better than that out of my old 7.3 pulling a trailer that was 4k less in weight...and not as high either...I am happy. Again keeping the speed down 55-60 towing. That was just the delete and tune difference. So $1500 invested to get that difference and saved $300 on my first trip pulling. Again, well worth doing., The difference I have seen just on the delete and tune, I figure it will take about 25k miles to make the difference...less for every mile towing.
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