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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 10-08-2008, 08:01 PM   #1 (permalink)
EcoModding Lurker
 
Join Date: Oct 2008
Location: PARKERSBURG WV
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Fuel Effecient Tires

I just replaced my factory tires on a 2005 Civic Hybrid and I dropped about 8 miles per gallon overnight. I am going to take the tires back to Sam's Club but I need to find some more effecient tires....does anyone have any suggestions?

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 10-08-2008, 08:13 PM   #2 (permalink)
Master EcoModder
 
NeilBlanchard's Avatar
 
Join Date: May 2008
Location: Maynard, MA Eaarth
Posts: 7,848

Mica Blue - '05 Scion xA RS 2.0
Team Toyota
90 day: 42.48 mpg (US)

Forest - '15 Nissan Leaf S
Team Nissan
90 day: 156.46 mpg (US)

Number 7 - '15 VW e-Golf SEL
TEAM VW AUDI Group
90 day: 155.81 mpg (US)
Thanks: 3,325
Thanked 2,858 Times in 1,796 Posts
Hi,

You can look for tires that have the maximum sidewall pressure of 51psi, then you will have found some low rolling resistance tires. In other words, if the maximum pressure written (molded into the rubber) on the sidewall of the tire is 51psi, then that tire should be as good as your originals.
__________________
Sincerely, Neil

http://neilblanchard.blogspot.com/
  Reply With Quote
Old 10-08-2008, 08:20 PM   #3 (permalink)
EcoModding Lurker
 
Join Date: Oct 2008
Location: PARKERSBURG WV
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Thanks for response...the ones I have that killed my MPG only have a 35 maximum pressure.
  Reply With Quote
Old 10-08-2008, 08:46 PM   #4 (permalink)
Master EcoModder
 
NeilBlanchard's Avatar
 
Join Date: May 2008
Location: Maynard, MA Eaarth
Posts: 7,848

Mica Blue - '05 Scion xA RS 2.0
Team Toyota
90 day: 42.48 mpg (US)

Forest - '15 Nissan Leaf S
Team Nissan
90 day: 156.46 mpg (US)

Number 7 - '15 VW e-Golf SEL
TEAM VW AUDI Group
90 day: 155.81 mpg (US)
Thanks: 3,325
Thanked 2,858 Times in 1,796 Posts
Hi,

Right, 44psi sidewall max is pretty typical, and running these at 38-40psi is a big improvement over the 35-36psi tires. Obviously, the 51psi tire can take pressures in the mid-40's and hopefully still ride okay, and improve your FE.
__________________
Sincerely, Neil

http://neilblanchard.blogspot.com/
  Reply With Quote
Old 10-09-2008, 06:34 AM   #5 (permalink)
Tire Geek
 
CapriRacer's Avatar
 
Join Date: May 2008
Location: Let's just say I'm in the US
Posts: 733
Thanks: 1
Thanked 320 Times in 201 Posts
Quote:
Originally Posted by DBASRA View Post
I just replaced my factory tires on a 2005 Civic Hybrid and I dropped about 8 miles per gallon overnight. I am going to take the tires back to Sam's Club but I need to find some more effecient tires....does anyone have any suggestions?
First, you should be aware that new tires will consume more fuel than worn tires - everything else being equal. This is due to more mass in the tread - and more mass generally means higher rolling resistance - all other things being equal.

Secondly, the pressure written on the sidewall of a tire has nothing to do with RR or fuel economy - except that running higher pressure helps fuel economy, but that would be true regardless of what is written on the sidewall.

The regulations which govern what can be imprinted on the sidewall are pretty vague - they only say "maximum", and different tire manufacturers interpret the regulation differently. The "max" pressure is based on a "tire standard" and that is also vague. Put another way, there are no tests that govern what CAN be imprinted, nor are there are standards that govern what SHOULD be imprinted, but the standard says that for passenger car standard load tires, the choices are 35, 44 or 51 psi - all very reasonable values for any given tire construction. DO NOT use sidewall pressure as a guide for anything other than what it says - Maximum.

Lastly, you should be aware that a tire's rolling resistance is also controlled by the tread rubber compound. Traction, wear, and rolling resistance are all part of the equation - and in order to get good RR, treadwear and/or traction have to be sacrificed. So if you see a tire with a 600 treadwear rating, you can guarrantee it will not have good fuel economy.

__________________
CapriRacer

Visit my website: www.BarrysTireTech.com

Last edited by CapriRacer; 10-09-2008 at 07:10 AM..
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Video: Can Skinnier Tires Increase Fuel Economy? Peakster EcoModding Central 67 06-06-2019 12:27 AM
Hydrogen Generator Experiment willy57 DIY / How-to 601 08-23-2016 05:53 AM
Top 5 most fuel efficient tires (Lowest Rolling resistance: LRR) blackjackel General Efficiency Discussion 144 01-25-2016 11:39 PM
mileage computer for a carbureted engine diesel_john Instrumentation 221 05-01-2014 10:38 PM
ElmScan + Customized Scantool Software = data logging! cfg83 Instrumentation 19 08-08-2010 09:24 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com