20 MPG???!!!! - Page 2 - GM Forum - Buick, Cadillac, Olds, GMC & Pontiac chat

2000-2005 Discuss your 2000-2005 Bonneville SE, SLE, and SSEi Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

20 MPG???!!!!

Old 02-08-2007, 05:57 PM
  #11  
Senior Member
Posts like a Camaro
 
Join Date: Jan 2004
Location: Aurora, Illinois
Posts: 922
Thanks: 0
Thanked 0 Times in 0 Posts
1994se is on a distinguished road
Default

I think i have two 1/16" holes evenly spaced on the flange. i only ask because on Sunday i drove to the grocery store, then walmart where i waited in the car for 5 minutes with it running, then drove the 2 miles home and the coolant temp just barely hit 180 degrees late in my venture.
1994se is offline  
Old 02-08-2007, 06:07 PM
  #12  
Senior Member
True Car Nut
 
Join Date: Jul 2004
Location: Grand Rapids, Mi
Posts: 5,656
Thanks: 0
Thanked 0 Times in 0 Posts
Archon is on a distinguished road
Default

Some will swap out their 180* drilled thermostats for the winter due to similar problems. I used to do that, but I had a couple of larger holes. As it got colder, it would set the SES. Since I switched to a 180* with only on 1/16th hole, I haven't had a problem and seems to warm up as quickly as the 195* used to.
Archon is offline  
Old 02-08-2007, 07:19 PM
  #13  
Senior Member
Posts like a Northstar
 
Join Date: Dec 2002
Location: Bellbrook, Ohio
Posts: 547
Thanks: 0
Thanked 0 Times in 0 Posts
compyelc4 is on a distinguished road
Default

kcoop99

Lately, my Bonne'* MPG has gone to the dogs too. A simple answer really so I don't worry about it.

Cold weather, especially if your'* is left outside will just kill gas mileage. From warm weather to cold weather you may see a 3-4 mpg drop. My car in warm months does 23-25 combination city/highway. 31 straight interstate driving.

In cold it drops to 20.5, and I baby the gas. Before you go replacing things I'd wait for warmer weather.
compyelc4 is offline  
Old 02-08-2007, 08:24 PM
  #14  
Senior Member
Posts like a Camaro
 
Join Date: Apr 2005
Location: Niagara Falls Ontario Canada
Posts: 1,121
Thanks: 0
Thanked 0 Times in 0 Posts
brianj is on a distinguished road
Default

Originally Posted by Archon
Some will swap out their 180* drilled thermostats for the winter due to similar problems. I used to do that, but I had a couple of larger holes. As it got colder, it would set the SES. Since I switched to a 180* with only on 1/16th hole, I haven't had a problem and seems to warm up as quickly as the 195* used to.
What is a SES Dick?

My mileage dropped to about 17 mpg combined from 22mpg. I figure the cold weather as well. I left my 180 stat in all winter as well, but to my knowledge its not drilled (Intense stat...do they come drilled??).

My o2 has never been replaced, maybe I'm due as well, but that'* a summer time warm weather job! 0 degrees F is too freaken cold to work on a car!!!!!
brianj is offline  
Old 02-08-2007, 09:11 PM
  #15  
Junior Member
 
Join Date: Aug 2005
Location: North of Buffalo, NY *** NEBF '05, '06, '07 *** ***ONBF & NYBF 06; 07*** ***WCBF 06***
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
singscountry1967 is on a distinguished road
Default

I'm voting for the "cold weather" and 89 octane gas. I saw a 4mpg drop when I used 89 instead of 93 in my other car (which required the higher octane). Idleing to warm up the car also uses more than you think. Also, do you go to the same gas station? Some folks find that the "cheaper" gas stations are cheaper for a reason.

Stick to a well-known gas station, buy 93 octane, and wait for the weather to get back to normal. In my area, the gas mixtures are altered in the Winter...resulting in a drop in mileage too. But you should have noticed this drop back in Nov/Dec.
singscountry1967 is offline  
Old 02-08-2007, 09:26 PM
  #16  
Senior Member
True Car Nut
 
Join Date: Jul 2004
Location: Grand Rapids, Mi
Posts: 5,656
Thanks: 0
Thanked 0 Times in 0 Posts
Archon is on a distinguished road
Default

Sorry Brian. Service Engine Soon. It sets the light and a code that says something like the coolant didn't reach thermostat regulating temperature within the specified time. The oxygen sensors start to get "tired" after about 50k miles. That'* what...something like 85km? So, if you're over that, it would be a good thing to add to your list of things to do. Your coolant leak could also have quickened things along with it. I know the Intense thermostat has a larger opening, but I do not recall whether or not it is drilled.
Archon is offline  
Old 02-09-2007, 03:06 AM
  #17  
Senior Member
Posts like a Camaro
 
Join Date: Jan 2004
Location: Aurora, Illinois
Posts: 922
Thanks: 0
Thanked 0 Times in 0 Posts
1994se is on a distinguished road
Default

The Intense thermostat does not come with a drilled flange as far as i know. Atleast the one i bought 4 months back wasn't.
1994se is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
billha
1992-1999
18
03-08-2009 06:31 PM
mkaake
1992-1999
23
05-05-2005 03:25 AM
grey3800
1987-1991
1
06-08-2003 07:15 PM
TheJestersRace
1992-1999
9
01-30-2003 04:01 PM
Sol
1992-1999
11
01-10-2003 08:12 PM


Thread Tools
Search this Thread
Quick Reply: 20 MPG???!!!!


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 MH Sub I, LLC dba Internet Brands

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.