Go Back   EcoModder Forum > EcoModding > EcoModding Central
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 02-15-2012, 12:29 PM   #1 (permalink)
Master EcoModder
 
Diesel_Dave's Avatar
 
Join Date: May 2011
Location: Indiana
Posts: 1,194

White Whale - '07 Dodge Ram 2500 ST Quad Cab 2wd, short bed
Team Cummins
90 day: 37.68 mpg (US)
Thanks: 112
Thanked 511 Times in 213 Posts
Temperature Effects

I was number crunching on my daily log data and thought folks might find this interesting. I plotted 80 days (160 commutes) worth of mileage and ambient temperature data:


Mileage goes to the left axis, temperature to the right.

Like everyone else, I can't wait for it to warm back up!

__________________
Diesel Dave

My version of energy storage is called "momentum".
My version of regenerative braking is called "bump starting".

1 Year Avg (Every Mile Traveled) = 47.8 mpg

BEST TANK: 2,009.6 mi on 35 gal (57.42 mpg): http://ecomodder.com/forum/showthrea...5-a-26259.html


  Reply With Quote
The Following 10 Users Say Thank You to Diesel_Dave For This Useful Post:
2000neon (03-13-2012), AndrzejM (11-10-2012), Ed-in-Maine (02-16-2012), FXSTi (02-15-2012), goandude (02-17-2012), JRMichler (02-15-2012), mort (02-15-2012), oil pan 4 (02-15-2012), paulu (03-13-2012), redpoint5 (11-10-2012)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 02-15-2012, 01:08 PM   #2 (permalink)
Master EcoModder
 
JRMichler's Avatar
 
Join Date: Feb 2011
Location: Phillips, WI
Posts: 1,013

Nameless - '06 GMC Canyon
90 day: 37.45 mpg (US)

22 Maverick - '22 Ford Maverick XL
90 day: 41.9 mpg (US)
Thanks: 188
Thanked 466 Times in 287 Posts
Try cross plotting temperature against gas mileage. Temperature on the horizontal axis and gas mileage on the vertical axis.
__________________
06 Canyon: The vacuum gauge plus wheel covers helped increase summer 2015 mileage to 38.5 MPG, while summer 2016 mileage was 38.6 MPG without the wheel covers. Drove 33,021 miles 2016-2018 at 35.00 MPG.

22 Maverick: Summer 2022 burned 62.74 gallons in 3145.1 miles for 50.1 MPG. Winter 2023-2024 - 2416.7 miles, 58.66 gallons for 41 MPG.
  Reply With Quote
Old 02-15-2012, 01:18 PM   #3 (permalink)
Master EcoModder
 
Diesel_Dave's Avatar
 
Join Date: May 2011
Location: Indiana
Posts: 1,194

White Whale - '07 Dodge Ram 2500 ST Quad Cab 2wd, short bed
Team Cummins
90 day: 37.68 mpg (US)
Thanks: 112
Thanked 511 Times in 213 Posts
Quote:
Originally Posted by JRMichler View Post
Try cross plotting temperature against gas mileage. Temperature on the horizontal axis and gas mileage on the vertical axis.
Okay, here you go:


40 deg F change results in about a 20% change in mileage. So mileage changes 1% for every 2 deg change. That's pretty significant.
__________________
Diesel Dave

My version of energy storage is called "momentum".
My version of regenerative braking is called "bump starting".

1 Year Avg (Every Mile Traveled) = 47.8 mpg

BEST TANK: 2,009.6 mi on 35 gal (57.42 mpg): http://ecomodder.com/forum/showthrea...5-a-26259.html


  Reply With Quote
The Following 9 Users Say Thank You to Diesel_Dave For This Useful Post:
2000neon (03-13-2012), AndrzejM (11-10-2012), CigaR007 (02-15-2012), D.O.G. (02-16-2012), gone-ot (02-15-2012), jsatter (02-15-2012), mcrews (02-15-2012), mort (02-15-2012), Superturnier (02-16-2012)
Old 02-15-2012, 01:27 PM   #4 (permalink)
Master EcoModder
 
CigaR007's Avatar
 
Join Date: Jul 2010
Location: Canada
Posts: 680

GreenTurtle (Retired) - '01 Toyota Echo Sedan
90 day: 44.85 mpg (US)

Zulu - '14 Honda CR-Z
90 day: 49.05 mpg (US)
Thanks: 150
Thanked 237 Times in 148 Posts
Awesome !
  Reply With Quote
Old 02-15-2012, 01:32 PM   #5 (permalink)
Corporate imperialist
 
oil pan 4's Avatar
 
Join Date: Jul 2011
Location: NewMexico (USA)
Posts: 11,175

Sub - '84 Chevy Diesel Suburban C10
SUV
90 day: 19.5 mpg (US)

camaro - '85 Chevy Camaro Z28

Riot - '03 Kia Rio POS
Team Hyundai
90 day: 30.21 mpg (US)

Bug - '01 VW Beetle GLSturbo
90 day: 26.43 mpg (US)

Sub2500 - '86 GMC Suburban C2500
90 day: 11.95 mpg (US)

Snow flake - '11 Nissan Leaf SL
SUV
90 day: 141.63 mpg (US)
Thanks: 269
Thanked 3,522 Times in 2,796 Posts
Nice this very good to see.
__________________
1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
  Reply With Quote
Old 02-15-2012, 01:33 PM   #6 (permalink)
Banned
 
Join Date: Oct 2009
Location: Fort Worth, Texas
Posts: 2,442

2004 CTD - '04 DODGE RAM 2500 SLT
Team Cummins
90 day: 19.36 mpg (US)
Thanks: 1,422
Thanked 737 Times in 557 Posts
Nicely done. What were the dates of the 80-day period, and what is the date of the first and last frost for your locale? Any other relevant climate data by which to make comparisons? (or, do dawn/dusk considerations play a part?)

(For us the potential frost period is Nov 23 - Mar 9; with some as years [as this one] no frost at all; January thru first week of February constitute winter"; maybe only 10-days). A/C use is the bugabear for FE.

You "commuters" can certainly have good data to work with in re set conditions of place and time over the year.

.
  Reply With Quote
Old 02-15-2012, 01:44 PM   #7 (permalink)
...beats walking...
 
Join Date: Jul 2009
Location: .
Posts: 6,190
Thanks: 179
Thanked 1,525 Times in 1,126 Posts
Now, *that's* the kind of number-crunching I like to 'see' -- show me the graphics (ha,ha)!

You've just documented & published the "Diesel Dave's TEMP Rule-of-Thumb":

"... -1% FE change per each -2ºF temp change...and...+1% FE change per each +2ºF temp change."

Last edited by gone-ot; 02-15-2012 at 04:02 PM..
  Reply With Quote
The Following User Says Thank You to gone-ot For This Useful Post:
mcrews (02-15-2012)
Old 02-15-2012, 03:10 PM   #8 (permalink)
Master EcoModder
 
mcrews's Avatar
 
Join Date: Oct 2009
Location: Texas
Posts: 3,523

The Q Sold - '02 Infiniti Q45 Sport
90 day: 23.08 mpg (US)

blackie - '14 nissan altima sv
Thanks: 2,203
Thanked 663 Times in 478 Posts
Dave,
how long is the comute?
Does the vehicle start uotside (so the temp has settled in overnite)
or is it in the garage?
__________________
MetroMPG: "Get the MPG gauge - it turns driving into a fuel & money saving game."

ECO MODS PERFORMED:
First: ScangaugeII
http://ecomodder.com/forum/showthrea...eii-23306.html

Second: Grille Block
http://ecomodder.com/forum/showthrea...e-10912-2.html

Third: Full underbelly pan
http://ecomodder.com/forum/showthrea...q45-11402.html

Fourth: rear skirts and 30.4mpg on trip!
http://ecomodder.com/forum/showthrea...tml#post247938
  Reply With Quote
Old 02-15-2012, 04:42 PM   #9 (permalink)
Master EcoModder
 
Diesel_Dave's Avatar
 
Join Date: May 2011
Location: Indiana
Posts: 1,194

White Whale - '07 Dodge Ram 2500 ST Quad Cab 2wd, short bed
Team Cummins
90 day: 37.68 mpg (US)
Thanks: 112
Thanked 511 Times in 213 Posts
Quote:
Originally Posted by slowmover View Post
Nicely done. What were the dates of the 80-day period, and what is the date of the first and last frost for your locale? Any other relevant climate data by which to make comparisons? (or, do dawn/dusk considerations play a part?)

(For us the potential frost period is Nov 23 - Mar 9; with some as years [as this one] no frost at all; January thru first week of February constitute winter"; maybe only 10-days). A/C use is the bugabear for FE.

You "commuters" can certainly have good data to work with in re set conditions of place and time over the year.

.
It's from Oct-10 unil Feb-15. It's 80 commuting days--not 80 days. Dates of potential first/last frost are before and after this time. I've had a couple mornings down below 15 deg F and those have been hard on the mileage. The "3-day average Temp" is the average of 3 mornings and 3 evenings, so mornings and evenings are grouped together. Dawn/dusk shouldn't play much of a role because pretty much all of it during that time period would have been when I driving it's still dark enough to have the lights on. Only now, in mid-Feb, is it getting light enough that I can have my lights off much.
__________________
Diesel Dave

My version of energy storage is called "momentum".
My version of regenerative braking is called "bump starting".

1 Year Avg (Every Mile Traveled) = 47.8 mpg

BEST TANK: 2,009.6 mi on 35 gal (57.42 mpg): http://ecomodder.com/forum/showthrea...5-a-26259.html


  Reply With Quote
The Following User Says Thank You to Diesel_Dave For This Useful Post:
slowmover (02-15-2012)
Old 02-15-2012, 04:44 PM   #10 (permalink)
Master EcoModder
 
Diesel_Dave's Avatar
 
Join Date: May 2011
Location: Indiana
Posts: 1,194

White Whale - '07 Dodge Ram 2500 ST Quad Cab 2wd, short bed
Team Cummins
90 day: 37.68 mpg (US)
Thanks: 112
Thanked 511 Times in 213 Posts
Quote:
Originally Posted by Old Tele man View Post
You've just documented & published the "Diesel Dave's TEMP Rule-of-Thumb":

"... -1% FE change per each -2ºF temp change...and...+1% FE change per each +2ºF temp change."
I just realized that if you do it in Celsius it would be neater--basically 1 deg = 1% change.

__________________
Diesel Dave

My version of energy storage is called "momentum".
My version of regenerative braking is called "bump starting".

1 Year Avg (Every Mile Traveled) = 47.8 mpg

BEST TANK: 2,009.6 mi on 35 gal (57.42 mpg): http://ecomodder.com/forum/showthrea...5-a-26259.html



Last edited by Diesel_Dave; 02-15-2012 at 04:59 PM..
  Reply With Quote
The Following User Says Thank You to Diesel_Dave For This Useful Post:
slowmover (02-15-2012)
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com