Go Back   Ford F150 Forum - Community of Ford Truck Fans > Late Model F150s > 2009 - Present Ford F150
Sign in using an external account
Register Forgot Password?


Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 07-14-2009, 12:20 AM   #1
Member
 
1-Grayt-truck's Avatar
 
Join Date: Jun 2009
Location: San Diego Area, CA.
Posts: 40
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Question Do you believe your truck's AVG. MPG display?

Hi all, Just wondering whether or not other F150 owners are relying on their 09' AVG. MPG displays, or are simply performing their own calculations to obtain true MPG results. Seems I keep having discrepencies between the truck display and my own calculations. Usually between 1 - 1.5 mpg with the truck display always giving the higher amount. In your own opinion which method do you find is most accurate and is the method you rely upon? Thanks.

*Note: I do reset my truck's Avg. MPG display each time I fill up.
1-Grayt-truck is offline   Reply With Quote
Old 07-14-2009, 12:24 AM   #2
Senior Member
 
tcarro2001's Avatar
 
Join Date: May 2009
Location: Mississippi
Posts: 222
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

I recalculate at each fillup. Mine is always 1-1.5 mpg higher than my manual calculations. Right around 15MPG on average (manual) and 16.4MPG (onboard), mostly highway miles.
tcarro2001 is offline   Reply With Quote
Old 07-14-2009, 12:33 AM   #3
Senior Member
 
Join Date: Apr 2009
Posts: 104
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

Mine is about 0.8 MPG higher on the display than hand calculated.
canoetrpr is offline   Reply With Quote
Old 07-14-2009, 12:45 AM   #4
Junior Member
 
Join Date: Jun 2009
Posts: 15
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

Quote:
Originally Posted by tcarro2001 View Post
I recalculate at each fillup. Mine is always 1-1.5 mpg higher than my manual calculations. Right around 15MPG on average (manual) and 16.4MPG (onboard), mostly highway miles.
Yep, that's about what mine is at. I've noticed if I run about three tanks of fuel without re-setting it is more accurate.
Wes28376 is offline   Reply With Quote
Old 07-14-2009, 02:22 AM   #5
2009 4x2 5.4 XLT Screw
 
Join Date: Feb 2009
Posts: 385
Mentioned: 0 Post(s)
Thanks: 0
Thanked 2 Times in 1 Post
Feedback Score: 0 reviews
Default

Mine seems to always be within 1 mpg of my manual calculations.
v_tach is offline   Reply With Quote
Old 07-14-2009, 09:38 AM   #6
2009 FX4
 
silverfx4's Avatar
 
Join Date: Jun 2009
Location: Deer Park, TX
Posts: 87
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

My trip computer is normally around 15.2 to 15.4 with mixed driving. Drove it from Houston to San Antonio and back last weekend. The trip computer said 15.6 when I returned home. My calculations show that I got 16.5 on the trip.
Mostly flat driving with the cruse set on 73. Only have 1900 miles on my truck so guess it may take some time for everything to get set and broken in.

Last edited by silverfx4; 07-14-2009 at 12:17 PM. Reason: spelling
silverfx4 is offline   Reply With Quote
Old 07-14-2009, 09:49 AM   #7
Member
 
Join Date: Jun 2009
Location: Texas
Posts: 44
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

There can be a problem with doing it manually also. Are you sure you are getting a gallon of gas everytime it says on the pump. There was an article that came out in the paper about a year ago ( Fort Worth ) They did a survey on stores around the metroplex that weren't calculated. They found that alot of the pumps were way off.
farmercr is offline   Reply With Quote
Old 07-14-2009, 10:07 AM   #8
Junior Member
 
Join Date: Feb 2009
Location: Texas
Posts: 26
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

I just go with the Computer. A lot less math! ; )
09screw is offline   Reply With Quote
Old 07-14-2009, 12:06 PM   #9
Ford/Mazda Parts guy
5 Year Member
 
djquik1's Avatar
 
Join Date: Jul 2008
Location: USA
Posts: 945
Mentioned: 0 Post(s)
Thanked 5 Times in 5 Posts
Feedback Score: 0 reviews
Default

Quote:
Originally Posted by farmercr View Post
There can be a problem with doing it manually also. Are you sure you are getting a gallon of gas everytime it says on the pump. There was an article that came out in the paper about a year ago ( Fort Worth ) They did a survey on stores around the metroplex that weren't calculated. They found that alot of the pumps were way off.
I find that to be correct.....The only time I have gotten the computer to match my hand calculations,is getting fuel before 6 am when the heat has not played havoc with expansion of the in ground tank and the tank on the truck.

I got 18.6 MPG's doing 75mph avg on the way back from Indiana this past weekend.
__________________
2010 F-150 CC (Harley Taillamps, ATC tonneau cover,DDM 5000k)
1990 F-150 RC (Russell Stainless brake lines, Taylor Thundervolt wires, MSD Coil, Cats removed 2.5" exhaust pipe)
2010 Milan(wife's) Corksport Strut Bar
djquik1 is offline   Reply With Quote
Old 07-14-2009, 12:15 PM   #10
2009 FX4
 
silverfx4's Avatar
 
Join Date: Jun 2009
Location: Deer Park, TX
Posts: 87
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

I have to agree with you about not always getting a gallon. I fulled up my wife's Honda pilot with a 19 gallon tank at Wal-mart a few months ago. It wasn't on empty and the pump said I had put 20.5 gallons in a 19 gallon tank. It normally never takes over 18.5 even when the gas gauge reads empty.
silverfx4 is offline   Reply With Quote
Old 07-14-2009, 12:15 PM
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Pics of Arizona Beige truck's PawPaw 2004 - 2008 Ford F150 36 05-20-2012 10:34 PM
Overhead Display jerry paul General F150 Discussion 3 09-28-2009 09:50 AM
Dim LED Display Intruder General F150 Discussion 2 05-09-2009 07:26 AM
Tell us about your truck's stereo or stereo plans!! TxOutlaw Stereo/Audio 85 01-12-2009 10:09 PM
display ish3500 1997 - 2003 Ford F150 2 04-17-2008 07:24 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off


Join F150 Forum

 

The Mustang Source
All times are GMT -4. The time now is 07:04 PM.


Copyright 2006 - 20011 F150forum.com
This site is in no way affiliated with the Ford Motor Company.