New wheels and tires for better gas mileage?? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


General GM Chat When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made. Chat about all things GM (and related cars). Off-topic stuff should be in the Lounge, and all Model specific mechanical problems should be posted in the proper forum.

Reply
 
 
 
Thread Tools Search this Thread
Old 05-10-2009, 02:41 PM   #1
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: May 2005
Location: Fredericton, New Brunswick.
Posts: 380
Thanks: 0
Thanked 1 Time in 1 Post
Timothy's Buick is on a distinguished road
Default New wheels and tires for better gas mileage??

I don't very often post here, however, i'd like to buy some new wheels and tires for my old PA.

Currently I am running fat 215/70r15 generic brand tires on 15 by 6 inch rims.
I remember when I switched to the bigger tires from the stock 205/70 r15 I saw my gas mileage take a bit of a hit. I lost about 50-80 kms a tank. Currently, I get 450-470 kms to a 53 liter fill up on average.

Last winter was even less as I had the snow tires (215/70 r15) and the fuel is blended differently.

I was thinking of finding some nice 16 inch wheels, and some new tires, p225/60 r16. I would like to know if this will improve my mileage or reduce it? I know it is a pretty common tire size as most bonnies, impalas and most GM'* i've seen wear this size. Impala'* actually seem to get awesome mileage with the base 3.4. They are also lightweight (alum frame, knuckles, etc)

It is either upgrade to the 16'* or get some new tires in the stock size 205/70 r15..

Also, what are decent tires? I'm thinking of michelin harmony or similar as I've heard michelins are designed for economy. I was also thinking of BF goodrich tires too, maybe the TA'*

Before anyone mentions it, yes i do coast as much as possible, i'm easy on the gas, keep the car in OD, and never travel over 100kph. If i drive any-more like a grampy (i'm 22) i'll prolly get pulled over.. Most driving is highway too.
Timothy's Buick is offline   Reply With Quote
Old 05-10-2009, 03:36 PM   #2
Senior Member
True Car Nut
 
Purplehazeir's Avatar
 
Join Date: Sep 2008
Location: Arlington, WA
Posts: 7,979
Thanks: 0
Thanked 1 Time in 1 Post
Purplehazeir is on a distinguished road
Default

The tires don't necessarily improve your gas mileage, they do change how the mileage get'* calculated and hence can make it better or worse.

For instance a higher profile tire will travel less revolution in a m/km than a smaller tire, thus recording less actual travel distance in a true mile which will affect the odometer and subsequent fuel consumption calculations.

The other factor is as you increase the tire width/height and wheel size, you add more weight. More weight does impact mileage.

If you've seen a big impact on your mileage you may want to consider replacing the O2 sensor, air filter and do a tune up with new plugs/wires if they have not been changed in awhile.
Purplehazeir is offline   Reply With Quote
Old 05-10-2009, 06:37 PM   #3
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: May 2005
Location: Fredericton, New Brunswick.
Posts: 380
Thanks: 0
Thanked 1 Time in 1 Post
Timothy's Buick is on a distinguished road
Default

I will probably do the o2 soon actually. I think its the one that came on the car, so i definitly know its long overdue. They're not cheap, at 140 bucks for an ac delco last time i checked at the parts store here. At least i'm not paying a couple hundred bucks for some of the newer ones!

I think 16'* are as low as i'll go, i'd like 17'*, but they would never survive our roads here!
Timothy's Buick is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Better gas mileage! help yourmom22 General GM Chat 3 04-27-2011 07:52 AM
Gas, Oil And Gas Mileage **** SERIES II ENGINES**** Nashville Cowboy General GM Chat 26 02-06-2007 06:23 PM
New Wheels and tires. Black_Stallion Detailing & Appearance 3 01-24-2007 03:59 AM
Tip for better gas mileage Grimm General GM Chat 16 08-30-2006 04:29 PM
How to get better gas mileage???? kimmers 1992-1999 2 11-10-2002 12:42 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -4. The time now is 04:34 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.