Rising mpg with summer tires - Fuelly Forums

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

Reply
 
Thread Tools Display Modes
 
Old 04-26-2007, 08:23 AM   #1
Registered Member
 
milesgallon.com's Avatar
 
Join Date: Mar 2007
Posts: 39
Country: United States
Rising mpg with summer tires

Yess, summer is soon here and the summer tires is on and my mpg is up to 33.25mpg (winters worst was 29). Might also help that i inflated the tires a bit more than the car manufacturers recommendation (still below tire max pressure)

Simon
__________________

__________________
Handy gas mileage and automotive calculators at MilesGallon.com lets you find out the real mpg of your vehicle, calculate the fuel consumption and cost for a trip and how about a tool that gives you the total cost per mile for a specifice vehicle over its lifetime.

milesgallon.com is offline   Reply With Quote
Old 04-26-2007, 10:40 AM   #2
Registered Member
 
brucepick's Avatar
 
Join Date: Feb 2007
Posts: 722
Country: United States
Location: Connecticut
Quote:
Originally Posted by milesgallon.com View Post
... Might also help that i inflated the tires a bit more than the car manufacturers recommendation (still below tire max pressure)
Simon
I'd suggest inflating to tire's max sidewall label pressure. That's with tire at cold ambient temp. My own belief is that the less-than-max-sidewall pressures recommended by mfg. are at best there to provide comfort for customer's backside. At higher pressures, FE will be higher and tires will last longer due to less flexing.

In practical terms, assume you have to drive to the pump so tire is never cold when you're inflating. Inflate to 4-5 psi over max sidewall and go about your business (hot tire will be about 4 psi over cold reading). In the morning check and deflate if needed to set tire at max sidewall. Max sidewall rating is based on a "cold" tire for whatever climate you're in.
__________________

__________________
Currently getting +/- 50 mpg in fall weather. EPA is 31/39 so not too shabby. WAI, fuel cutoff switch, full belly pan, smooth wheel covers.

Now driving '97 Civic HX; tires ~ 50 psi. '89 Volvo 240 = semi-retired.
brucepick is offline   Reply With Quote
Old 04-26-2007, 12:43 PM   #3
Registered Member
 
milesgallon.com's Avatar
 
Join Date: Mar 2007
Posts: 39
Country: United States
I read on some auto page on the net that for best handling at high speed a good starting point is the tires max pessure (the one pinted on the sidewalls) minus 10% so I went a little bit below that (still far above the car manufacturers recommendation) as I wouldnt want too bad comfort.

On that same page they also noted that the manufacturers recommendation is often way too low.

I'll have to experiment with even higher pressure up to tire max later on, this gas tank was not optimal as I was once in a hurry and did 70-80mph at times, thats about all I can get out of our old mercedes

Simon
__________________
Handy gas mileage and automotive calculators at MilesGallon.com lets you find out the real mpg of your vehicle, calculate the fuel consumption and cost for a trip and how about a tool that gives you the total cost per mile for a specifice vehicle over its lifetime.

milesgallon.com is offline   Reply With Quote
Old 04-26-2007, 03:09 PM   #4
Team OPEC Busters!
 
GasSavers_Brock's Avatar
 
Join Date: Oct 2006
Posts: 196
Country: United States
In this article for law enforcement they recommend max side wall pressure no matter what the vehicle says. It seems to be right on the money as far as I can see.

http://www.officer.com/article/artic...on=19&id=27281
GasSavers_Brock is offline   Reply With Quote
Old 04-27-2007, 02:58 AM   #5
Registered Member
 
milesgallon.com's Avatar
 
Join Date: Mar 2007
Posts: 39
Country: United States
Sounds like they have done some proper research, I will definetly try max sidewall pressure soon.

I always add 2-3 psi extra when inflating as there is always some leakage when disconnecting the pressure air hose, I measured it one time by disconnecting, reconnecting and re-checking the pressure.

Simon
__________________
Handy gas mileage and automotive calculators at MilesGallon.com lets you find out the real mpg of your vehicle, calculate the fuel consumption and cost for a trip and how about a tool that gives you the total cost per mile for a specifice vehicle over its lifetime.

milesgallon.com 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
Basic Stats poorboymeyer Fuelly Web Support and Community News 2 09-22-2009 09:19 AM
Ability to comment on Fuel Tips randomic Fuelly Web Support and Community News 4 08-22-2008 12:25 AM
Electrical power and cars. DracoFelis Automotive News, Articles and Products 2 09-16-2006 02:31 PM
"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 08:36 PM.


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