Go Back   EcoModder Forum > EcoModding > General Efficiency Discussion
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 11-04-2009, 01:44 PM   #1 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,048

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 53.56 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 58.34 mpg (US)
Thanks: 3,691
Thanked 6,506 Times in 3,370 Posts
Exclamation Friendly reminder: CHECK YOUR TIRE PRESSURE! (It's getting colder in the north!)

I'll admit I don't do it regularly enough.

But holy cow, I had a rude reminder to check my tire pressure this morning. I hadn't measured the energy usage of the last half dozen or so charge cycles in the ForkenSwift until last night's charge, and this one was awful.

396 Watt/hours per mile. One of my worst ever, in the 70+ cycles I've recorded. (Works out to about 85 MPGe using BTU equivalence - which is pretty lousy for an EV of this size.)

(For comparison, my "lifetime" energy use is 288 Wh / mile. That's measured at the wall (Kill-a-watt), from data for 70 charge cycles, and includes summer and winter driving - more summer than winter, though.)

So I checked the tires, and sure enough a couple were well down, ~13 lbs below where I normally have them. There were other contributing factors to the bad performance, but the tires were a big part of it.

Weather's getting colder (for those of us in the northern hemisphere)... So check your pressure!

__________________
Latest mods: 3-cylinder Mitsubishi Mirage. EcoMods now in progress...
Ecodriving test:
Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 11-04-2009, 03:17 PM   #2 (permalink)
Master EcoModder
 
vtec-e's Avatar
 
Join Date: May 2008
Location: Ireland
Posts: 507

De Yaris - '04 toyota yaris T2
90 day: 69.55 mpg (US)
Thanks: 111
Thanked 32 Times in 22 Posts
Just had the weather turn cold here too. Must check them in the morning......while i'm servicing De Yaris. Woo hoo!!
I guess it's a case of "you know you're an ecomodder when you enjoy servicing your car"
Just not in the freezing rain though..........hmmmm

ollie
__________________
  Reply With Quote
Old 11-04-2009, 03:22 PM   #3 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,048

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 53.56 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 58.34 mpg (US)
Thanks: 3,691
Thanked 6,506 Times in 3,370 Posts
Working on the car in the cold is definitely no fun. When I had my '89 Accord - which needed much more mechanical attention than the Firefly - I used to do a flurry (no pun intended) of maintenance tasks in the late fall in the hopes it would go through winter with no trouble.

Even just checking tire pressure when it's -10 isn't a pleasant little chore.
__________________
Latest mods: 3-cylinder Mitsubishi Mirage. EcoMods now in progress...
Ecodriving test:
Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Old 11-04-2009, 04:17 PM   #4 (permalink)
...beats walking...
 
Join Date: Jul 2009
Location: .
Posts: 6,190
Thanks: 179
Thanked 1,522 Times in 1,123 Posts
Quote:
Originally Posted by MetroMPG View Post
I used to do a flurry (no pun intended) of maintenance tasks in the late fall in the hopes it would go through winter with no trouble.
...what most people label: "...scheduled/planned maintenance."
  Reply With Quote
Old 11-04-2009, 08:58 PM   #5 (permalink)
Hi-Tech Redneck
 
Johnny Mullet's Avatar
 
Join Date: May 2008
Location: Ashtabula, Ohio
Posts: 1,436
Thanks: 6
Thanked 48 Times in 41 Posts
Send a message via AIM to Johnny Mullet Send a message via MSN to Johnny Mullet
All my vehicles are good to go. My Chevy truck has not lost even 1 LB of air in those new Buckshot Mudders I installed a few months back. We got another car also. A 1996 Monte Carlo with a 3.4L V6. All the tires on it were reading less than 20 PSI when I got it and serviced it...........





What's funny though is after the wife got this car, she really rushed me over the weekend to get the oil changed, brakes replaced, A/C Compressor replaced, etc and we took it for a ride and it was good. She put $10.00 in it at the gas station and said she was driving it to work. Monday she took it to work. Tuesday, I get out to get in my car and see her Geo Metro is gone and the Monte Carlo is sitting. I called her and asked........

"What's wrong with the Monte Carlo? I see you took the Geo."

She said..........

"That $10.00 we put in it is gone already. $10.00 goes all week in the Geo."
__________________

GeoMetroforum.com - got mpg?

Last edited by Johnny Mullet; 11-04-2009 at 09:13 PM..
  Reply With Quote
Old 11-04-2009, 09:15 PM   #6 (permalink)
Intermediate EcoDriver
 
Mustang Dave's Avatar
 
Join Date: May 2009
Location: Northern Arizona - It's a DRY cold..
Posts: 668

Trigger - '07 Ford Mustang V6 Premium Coupe
Team Mustang
Sports Cars
90 day: 33.47 mpg (US)

Big Red (retired) - '89 Ford F-250 4wd Custom
90 day: 18.13 mpg (US)

Big Red II - '13 Ford F-150 FX4
Pickups
90 day: 18.75 mpg (US)
Thanks: 162
Thanked 128 Times in 101 Posts
I checked mine this past Sunday. Overnight low was in the teens. They were about 2 PSI low.
Just a little cold weather maintenance...
Northern Arizona doesn't fit into most people's vision of Arizona.
__________________
Fuel economy is nice, but sometimes I just gotta put the spurs to my pony!



Quote:
Originally Posted by thatguitarguy View Post
Just 'cuz you can't do it, don't mean it can't be done...
Quote:
Originally Posted by elhigh View Post
The presence of traffic is the single most complicating factor of hypermiling. I know what I'm going to do, it's contending with whatever the hell all these other people are going to do that makes things hard.
  Reply With Quote
Old 11-04-2009, 10:02 PM   #7 (permalink)
Ecodriver
 
newhavenpatriot's Avatar
 
Join Date: Oct 2009
Location: Connecticut
Posts: 73

Auto. 2007 Yaris - '07 Toyota Yaris
Team Toyota
90 day: 42.31 mpg (US)
Thanks: 2
Thanked 1 Time in 1 Post
It's been getting steadily colder in CT, and the last time I filled my tires was October 16th. Between the time and the colder temps, they were down from 40 to 32 or so. Thanks for reminding me! Now they're happily at 40 again.
__________________

"Know your rights..... all three of 'em!"
  Reply With Quote
Old 11-04-2009, 10:13 PM   #8 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,048

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 53.56 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 58.34 mpg (US)
Thanks: 3,691
Thanked 6,506 Times in 3,370 Posts
Ran a bunch of errands in & out of town today in the ForkenSwift - man, it sure likes to coast more than it did yesterday. I guess it's true we don't notice change that happens very gradually.

Anyway, it's on the charger now. We'll see what the kill-a-watt says in the AM.

Quote:
Originally Posted by Johnny Mullet View Post
She said..........

"That $10.00 we put in it is gone already. $10.00 goes all week in the Geo."
Great story, Mullet!
__________________
Latest mods: 3-cylinder Mitsubishi Mirage. EcoMods now in progress...
Ecodriving test:
Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Old 11-04-2009, 10:52 PM   #9 (permalink)
Hi-Tech Redneck
 
Johnny Mullet's Avatar
 
Join Date: May 2008
Location: Ashtabula, Ohio
Posts: 1,436
Thanks: 6
Thanked 48 Times in 41 Posts
Send a message via AIM to Johnny Mullet Send a message via MSN to Johnny Mullet
This is also a good time to check your antifreeze (ICE Engines) protection. It's gonna be a long, cold winter.
__________________

GeoMetroforum.com - got mpg?
  Reply With Quote
Old 11-05-2009, 08:43 AM   #10 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,048

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 53.56 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 58.34 mpg (US)
Thanks: 3,691
Thanked 6,506 Times in 3,370 Posts
Quote:
Originally Posted by MetroMPG View Post
We'll see what the kill-a-watt says in the AM.
Whew - that's better: 282 Watt/hours per mile. (119 MPGe)Right back to near the lifetime average.

Beats the heck out of 396 Wh/mi (85 MPGe)!

__________________
Latest mods: 3-cylinder Mitsubishi Mirage. EcoMods now in progress...
Ecodriving test:
Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Hyperinflating tires CapriRacer Hypermiling / EcoDriver's Ed 273 04-28-2020 12:56 PM
Top 5 most fuel efficient tires (Lowest Rolling resistance: LRR) blackjackel General Efficiency Discussion 144 01-25-2016 11:39 PM
Discussion on tire efficiency Ernie Rogers General Efficiency Discussion 69 12-27-2014 01:17 PM
Proposed braking test: comparing tire pressure @ 50 psi vs 35 brucepick EcoModding Central 55 06-11-2011 08:29 PM
Tire Engineer here - concerned about hyperinflating tires CapriRacer Introductions 48 09-26-2009 09:25 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com