6.4 BAD MPG - Ford Powerstroke Diesel Forum
6.4L Performance Parts Discussion What has or has not worked for you?

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Old 05-23-2011, 07:23 AM
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6.4 BAD MPG

I got an 08 6.4 stock with an 8inch rize lift on 37inch nitto at tires on 20inch xd wheels.I know thats part of it, but iam only geting like 11.5mpg by the display.I should have keep my 6.0 i would get like 17 city and 21-22 hwy by hand math. I had a gasser b4 on 40inch tsl and it got 12-13 anywhere. i bought the 08 the way it sits are i would change it back to stock lift besides a 2inch in the front. should i sell and get me a 6.0 r what? and what can i do to the truck to get the mpg up? this thing might just go bye bye real fast the diesel is eating me up.
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Old 05-23-2011, 07:30 AM
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well the lift and tires is def not helping.. in order to get better MPG your going to have to start deleting some of the restrictive smog crap...

so my suggestions are:
Intake
DPF delete exhaust
and a tuner (H&S, SCT or Spartan)

-Raul
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Old 05-23-2011, 07:53 AM
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what kind of mpg would i be geting if i added the h&s and got rid of the dpf?
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Old 05-23-2011, 07:59 AM
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Better then what you are getting now lol. It depends on your driving really. Some guys are seeing close to the 20's but you do have bigger tires so ya.
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Old 05-23-2011, 08:06 AM
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i have deleted everything and the way i drive which is not really hard i get 12 city and 16 to 17 highway
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Old 05-23-2011, 12:34 PM
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My 2 cents, if your looking for mileage get a Ford Ranger, if your looking for power stay with the 6.4
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Old 05-23-2011, 12:53 PM
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Quote:
Originally Posted by gregw338 View Post
My 2 cents, if your looking for mileage get a Ford Ranger, if your looking for power stay with the 6.4
My bone stock 6.4 250 get the same mileage as my '08 4X4 Ranger did.
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Old 05-23-2011, 01:40 PM
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You should consider yourself lucky if you get 12.5 mpg with that size of lift & tires. I only got 12 mpg hwy with my truck stock height and tires. S&B, dpf delete, and Spartan 250 got me up around 18 mpg hwy stock height and tires. 4" lift with 35" tires brought me back down around 15-16 mpg hwy. Only way to improve mileage is to get rid of dpf. To do that you will need a programmer.
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Old 05-23-2011, 07:04 PM
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Like a few stated above, deleting the DPF/DOC and adding a tuner is the best route to take. I recommend:

1. AFE or S&B cold air intake
2. 4" or 5" downpipe back exhaust
3. Spartan Phalanx/DashDAQ tuner

We are running a few Memorial Day specials through the end of this week that you might want to check out. Let me know if I can help or answer any questions!

Spartan Diesel Technologies
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