temp vs mpg - Fuelly Forums

Android Users - Coming Soon! - Migrating from aCar 4.8 to 5.0

Reply
 
Thread Tools Display Modes
 
Old 02-06-2007, 02:32 PM   #1
Team OPEC Busters!
 
GasSavers_Brock's Avatar
 
Join Date: Oct 2006
Posts: 196
Country: United States
temp vs mpg

I have also been very interested in how outside temps affect mpg. I have been collecting data for quite a while, but honestly not sure how to compile it to make since.

Daily I kept track of my mpg, engine temp when done, adv speed, outside temp and if the engine was cold, warm (heated via coolant heater) or hot (as in just ran and is already warmed up.

If someone wants to take a shot with the excel data feel free.

It is at http://www.uwgb.edu/nevermab/mpg.xls
__________________

GasSavers_Brock is offline   Reply With Quote
Old 03-18-2007, 12:03 PM   #2
Registered Member
 
Join Date: Mar 2007
Posts: 4
Country: United States
just to make sure your considering this... gas is formulated differently throughout the year depending mostly on weather.. which is a large portion of the reason why your seeing such a decrease in fuel economy in the winter.
__________________

thecrxproject is offline   Reply With Quote
Old 03-18-2007, 04:59 PM   #3
Registered Member
 
MetroMPG's Avatar
 
Join Date: Dec 2005
Posts: 4,223
Country: United States
Actually, many people overestimate the effects of seasonal gasoline formulations on fuel economy. In fact, most other factors affecting your cold weather fuel consumption play a much larger role than the reduced energy content in "winter gas".

EPA:
Quote:
typical summer conventional gasolines contain 1.7% more energy than typical winter conventional gasolines.
http://www.epa.gov/otaq/rfgecon.htm
MetroMPG is offline   Reply With Quote
Old 03-18-2007, 08:36 PM   #4
ELF
Registered Member
 
ELF's Avatar
 
Join Date: Jan 2007
Posts: 245
Country: United States
I'm not sure our gas here in MN changes at all. We used to get ethanol added in winter only, as a oxygenate.(sp?) now we have e-10 year around. I can't tell any difference between summer and winter gas myself.
__________________
ELF is offline   Reply With Quote
Old 03-18-2007, 09:35 PM   #5
Supporting Member
 
cfg83's Avatar
 
Join Date: Sep 2006
Posts: 1,779
Country: United States
ELF -

Quote:
Originally Posted by ELF View Post
I'm not sure our gas here in MN changes at all. We used to get ethanol added in winter only, as a oxygenate.(sp?) now we have e-10 year around. I can't tell any difference between summer and winter gas myself.
I think that here in LA there is no reason for them to change the formula at all.

CarloSW2
__________________
Old School SW2 EPA ... New School Civic EPA :

What's your EPA MPG? http://www.fueleconomy.gov/feg/calculatorSelectYear.jsp
cfg83 is offline   Reply With Quote
Old 03-18-2007, 09:39 PM   #6
Registered Member
 
GasSavers_Red's Avatar
 
Join Date: Nov 2006
Posts: 513
Country: United States
Send a message via MSN to GasSavers_Red
We get the change up in NorCal. There is enough ethanol that you can actually smell it
__________________
GasSavers_Red is offline   Reply With Quote
Old 03-19-2007, 08:08 AM   #7
Team OPEC Busters!
 
GasSavers_Brock's Avatar
 
Join Date: Oct 2006
Posts: 196
Country: United States
I do understand that fuel changes as the temps change. I believe diesel has a wider total BTU change as the fuel changes for winter. I also run snows and often change their pressure between 30 psi and 45 psi depending on weather as well.

But what I am getting at is since I am on the same tank for about 4 weeks I can see a difference as the temps raises and drops, the fuel is the same the whole time so the temps has to be whats causing the change.
__________________

GasSavers_Brock is offline   Reply With Quote
Reply

Thread Tools
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Not very precise mpg calculation larjerr Fuelly Web Support and Community News 4 08-20-2012 02:03 AM
Browse Vehicle (I cant find my own vehicle.) deadbanana0717 Fuelly Web Support and Community News 2 09-29-2011 11:19 PM
Keeping my distance in traffic khurt General Fuel Topics 8 09-07-2008 04:23 AM
Car wrecked. Compaq888 General Discussion (Off-Topic) 80 06-15-2006 12:23 AM
"active" aero grille slats on 06 civic concept MetroMPG General Fuel Topics 21 01-03-2006 01:02 PM

Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 12:30 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.