Will a 180* stat hurt my fuel mileage? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Your Other Rides: Pics & Videos Post your pictures of your non-GM vehicles. Also discuss mechanical problems regarding your non-GM (Car vids not yours should be in the lounge)

Reply
 
 
 
Thread Tools Search this Thread
Old 05-18-2008, 03:01 AM   #1
Senior Member
True Car Nut
Thread Starter
 
Join Date: Sep 2006
Location: Bloomington, MN
Posts: 3,693
Thanks: 0
Thanked 0 Times in 0 Posts
GoldenBullet is on a distinguished road
Default Will a 180* stat hurt my fuel mileage?

I'm thinking getting one this summer, and wondering how much/ if at all it will hurt my MPG'*

Thanks.
GoldenBullet is offline   Reply With Quote
Old 05-19-2008, 04:49 PM   #2
Senior Member
Posts like a Corvette
 
Join Date: Jan 2007
Location: San Diego, CA
Posts: 1,451
Thanks: 0
Thanked 0 Times in 0 Posts
agrazela is on a distinguished road
Default

There'* a big debate going on over on ClubGP on this right now. Some say it does, some say not. I have seen no compelling documentation one way or the other.

Although I have not done a perfect A / B comparison (that is, no other changes at all) between 180 / 195 in my 1998 LeSabre, I believe the 180 T-stat is dinging me for about 2 mpg in my mixed city/highway driving (i.e., daily commuting), while allowing me to advance timing (with tuner) a few degrees. I'm getting a consistent 17-18 mpg, where I think I should be getting 19-20. I believe this mpg loss (if I can confirm it) may be because the fuel is not atomizing as well when the engine is not heating up as much.

I don't believe the 180 T-stat is having any measureable impact on mpg'* (or timing allowed) on long, cruising highway trips. There I get 32-35 mpg, depending on how packed the car is (far less of course when we have six people in the car, the car-topper, are towing the popup, and are heading to Big Bear / Tahoe, etc. )

I plan to go back to a 195 degree T-stat in the very near future, and see if my mpg'* go up. If so, I'm sticking with 195 and getting a bigger aux trans cooler. Gas prices are such that a few degrees of timing advance isn't worth a maybe 10% loss in mpg on the driving I do >75% of the time
agrazela is offline   Reply With Quote
Old 05-20-2008, 02:32 AM   #3
Senior Member
True Car Nut
Thread Starter
 
Join Date: Sep 2006
Location: Bloomington, MN
Posts: 3,693
Thanks: 0
Thanked 0 Times in 0 Posts
GoldenBullet is on a distinguished road
Default

hmm, interesting, well, once i get paid ill probably try it and see how it does. the reason i want it is that my blazer runs terribly hot and it worries me, but who knows how accurate my temp gauge is
GoldenBullet is offline   Reply With Quote
Old 05-20-2008, 09:24 AM   #4
Senior Member
True Car Nut
 
Join Date: Jun 2003
Location: Purgatory
Posts: 6,313
Thanks: 0
Thanked 0 Times in 0 Posts
PontiacDad is on a distinguished road
Default

I have seen the difference between a 180 drilled and a stock 195 and mine drops about 2mpg. I tested drilled 180 to drilled 160 too, no change in mileage.
Testing was highway only, 120 miles between gas stations.
PontiacDad is offline   Reply With Quote
Old 06-30-2008, 02:31 AM   #5
Member
Posts like a V-Tak
 
Join Date: Jun 2008
Location: Iowa
Posts: 79
Thanks: 0
Thanked 0 Times in 0 Posts
NHogan is on a distinguished road
Default

Golden you try it? Interested in the results you figued out.
NHogan is offline   Reply With Quote
Old 08-24-2008, 09:20 PM   #6
Village Idiot
Posts like a Turbo
 
Join Date: May 2007
Posts: 280
Thanks: 0
Thanked 0 Times in 0 Posts
iluvmybonnie is on a distinguished road
Default

the stock on is just fine. if a 180 or 160 would have been better it would have come from the factory with one.


GM > nerds on car forums
iluvmybonnie is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
180 t-stat/180 Fan Turn On - Running 195-205*? TommyGloves 2000-2005 9 05-08-2006 06:37 PM
Does Rockers and A Cam hurt gas mileage? PRD2BDF Performance, Brainstorming & Tuning 19 02-19-2006 10:37 PM
Does switching to a cooler stat REALLY hurt MPG? anthonyv62 General GM Chat 4 06-09-2003 07:43 PM
180 stat smellbird 1992-1999 4 02-28-2003 07:48 PM
NEED HELP UNDERSTANDING WHY TO USE 180 STAT!!!!!!!!!! d151avid 1992-1999 3 11-10-2002 01:13 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 04:19 AM.


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.