Extreme decrease in mileage - Ford Powerstroke Diesel Forum
LinkBack Thread Tools Display Modes
post #1 of 2 Old 03-04-2008, 02:06 PM Thread Starter
Powerstroke.org Rookie
Join Date: Aug 2007
Posts: 20
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Extreme decrease in mileage

I've had my 2002 7.3 4x4 xtra cab (auto) since the end of last summer, and I have consistently gotten 18-20 mpg in it, no matter the driving (haven't towed my boat yet). Anyways, starting a month or two ago, my truck has been extremely difficult to start in sub 50 degree weather. It usually takes me a few minutes to get it started up. On top of that, my gas mileage has dropped considerably. I now get 14-15 mpg, and that is even when babying it. When it finally does start up, it usually shoots out black and blue for the first time, but then it starts up normally for any following start ups in the day.

What I have done:

-changed the oil to 5w-40 rotella synthetic
-drained the water/fuel separator
-replaced the fuel filter.

The only modifications to the truck are a 6" lift and 35" tires (both done prior to the problem).

Any ideas?


2002 Ford F-250 4x4
- 6" Tuff Country EZ-ride lift
- 35x12.5x17

Last edited by OneBigD; 03-04-2008 at 02:30 PM.
OneBigD is offline  
Sponsored Links
post #2 of 2 Old 03-04-2008, 03:21 PM
Compression Ignition Addict
mario a diangelo's Avatar
Join Date: Jan 2008
Location: eldersburg
Posts: 320
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
winter fuel, In the winter they add chemicals to the fuel so it does not gel or smoke excessively in the colder months. those chemicals burn much faster then diesel, hence the loss in mileage

2012 F-250 4dr shrt bed red blk leather
6.7 tuned by eric
little more then stock
2003 f-350extra cab short bed - sold
built ford tough package
4"skyjacker up front stock rear
diy boost fooler
4"custom intake
all black 20's
on 35"xtreme mt's

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
mario a diangelo is offline  
Sponsored Links

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


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
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome