Horrible MPG? - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 04-26-2010, 06:38 PM
Powerstroke.org Fanatic
 

Join Date: Feb 2010
Location: Gilroy CA
Posts: 92
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Horrible MPG?

06 6.0 61,000 miles
SCT tuned with SRL from Matt @ Gearhead
6" fabtech lift on 35's
3:73's

Just got the oil changed to synthetic and did the fuel filters....Ever since I bought it 3 months ago I've only been getting about 300-320 miles to a tank and I have the 28 gallon tank. 11 mpg for a diesel? I figured atleast 15?

What is wrong with my truck? I was figuring maybe an injector is clogged? What should I run through it to clean them out?
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 04-26-2010, 06:47 PM
Compression Ignition Addict
 

Join Date: Dec 2006
Location: Albert Lea,MN
Posts: 201
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Big tires and lift kit plus running more power my guess is you us the go pedal a little hard. I can make my 7.3L with 6 spd manual get 12 mpg or 20 mpg depending on how I drive. That lift and tires will hurt the mileage alot and if that is city driving that ain't to bad. oh and I have 3.73 gears also.
Reply With Quote Quick reply to this message
  #3  
Old 04-26-2010, 06:52 PM
Lt. Negativity
 

Join Date: Jun 2007
Location: Stafford
Posts: 1,734
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Talk to Matt about what you have maybe he can adjust your tuning for you.
Reply With Quote Quick reply to this message
  #4  
Old 04-26-2010, 06:54 PM
Powerstroke.org Fanatic
 

Join Date: Mar 2006
Location: SOUTH CAROLINA
Posts: 119
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
fuel mileage

i have a bone stock 2005 short bed crew cab 4x4, w/ 3:73's also,i added an airaid air filter. my mileage dropped to 15 hwy, from +/- 19/20 thats as long as i keep it below 2k rpm, and my foot out of it. i'm running a half a btl of ford/motorcraft fuel additive from my local dealer, in every other tankful, i did some reading on powerstrokehelp.com , and took my cat.converter off , and drilled the guts out of it, and now my mileage is back around 19-20 hwy.
Reply With Quote Quick reply to this message
  #5  
Old 04-26-2010, 06:57 PM
Powerstroke.org Fanatic
 

Join Date: Feb 2010
Location: Gilroy CA
Posts: 92
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
For the past 2 tanks I've kept it under 2500 rpms the whole 2 tanks...no improvement on how i drive. Also already have the cat and muffler delete.

Same miles per tank as when before I had the SCt....AND I adjusted for the bigger tires in the tune and still get horrible mileage.

Last edited by dstryr; 04-26-2010 at 07:01 PM.
Reply With Quote Quick reply to this message
  #6  
Old 04-26-2010, 06:58 PM
Compression Ignition Addict
 

Join Date: May 2007
Location: America
Posts: 6,783
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
My 05 had 35's and stock gears and never saw above 12 mpg. I'de barley get 300 miles to a tank and I was freeway driving.
Reply With Quote Quick reply to this message
  #7  
Old 04-26-2010, 07:01 PM
Lt. Negativity
 

Join Date: Jun 2007
Location: Stafford
Posts: 1,734
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Thats odd, when I had mine on 37's and 3.73's I was getting close 18pmg towing a car behind me.
Reply With Quote Quick reply to this message
  #8  
Old 04-26-2010, 07:22 PM
Compression Ignition Addict
 

Join Date: Sep 2008
Posts: 555
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 1 reviews
I have 6" lift with 37's and highway driving I get right around 14.5-14.9 mpgs, city driving probably right around 11-12. I want to get 4.30 hoping vit would help my mpg's but spending 2000 or more is hard for me to throw out when the mpg might not be that big of a increase

oh yeah and those mpg's are with fppf fuel treatment, I just used my last bottle today.. I'm going on a 700 mile road trip in a couple weeks and will be using the revx fuel treatment, well see of that helps

Last edited by yosh30; 04-26-2010 at 07:26 PM.
Reply With Quote Quick reply to this message
  #9  
Old 04-26-2010, 07:56 PM
Compression Ignition Addict
 

Join Date: Aug 2009
Posts: 229
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Airfilter? Fuel Filter? Make sure all your cylinders are firing, could have a leaky injector, etc...

Other than that I'm stumped
Reply With Quote Quick reply to this message
  #10  
Old 04-26-2010, 08:15 PM
Member
 

Join Date: Jan 2010
Location: West Coast
Posts: 49
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Are you calculating the "old fashioned" mathematical way....or going by the onboard computer?? If the computer has not been recalibrated for wheel/tire size....the speedo error adds up pretty quick when trying to calculate mileage!

Hows the transmission been acting?
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 12:04 PM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

vB.Sponsors