gas milage - 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 05-31-2007, 08:08 PM   #1
HLB
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Mar 2006
Location: Lewis Center, Ohio
Posts: 90
Thanks: 0
Thanked 0 Times in 0 Posts
HLB is on a distinguished road
Default gas milage

How much does bad plug wires. bad 02 sensors and old pcv valves affect gas milage? When you change transmission fluid how much does the trans pan hold? What is the purpose of drilling a 180 thermostat?I have a 2000 SSEi with 74000 milage on it . Only mods is a 180 thermostat and a 3.4 pulley.
HLB is offline   Reply With Quote
Old 05-31-2007, 09:13 PM   #2
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

Unfortunately, there'* no quick and easy answer as far as a figure for your question. However, each (depending on how bad) except for the pcv valve, can significantly affect both fuel mileage, and performance.

The O2 sensor helps the computer decide the proper air/fuel mix and has to respond quickly enough for the information to be useful.

Spark plugs and wires - if each cylinder isn't firing properly, that means the fuel sent to that cylinder is wasted by not being burned, and does nothing to add to the power the engine makes.

If the intent of your question is to find out if it'* time for replacement, the short answer based on mileage alone is: O2 yes (ACDelco or Denso); plug wires - yes (NAPA Belden or other good quality wires - Taylor'* have been known to have a problem.); plugs - coming up on it. No Bosch or platinum plugs. PCV - pull it, shake it, see if it rattles. If it does - it'* likely ok.
Archon is offline   Reply With Quote
Old 06-01-2007, 08:36 PM   #3
Mark Fahey
Guest
 
Posts: n/a
Default

The manual says that the transmission holds 7.6 quarts when you drop the pan.
  Reply With Quote
Old 06-02-2007, 11:08 AM   #4
Junior Member
Posts like a Ricer Type-R
 
Join Date: Mar 2004
Posts: 21
Thanks: 0
Thanked 0 Times in 0 Posts
erekstad is on a distinguished road
Default

Quote:
Originally Posted by Mark Fahey
The manual says that the transmission holds 7.6 quarts when you drop the pan.
I just dropped my pan last weekend and I'll confirm the 7.6 quarts. I bought 2 one gallon jugs of Dexron VI and I have less then a quart left.
erekstad is offline   Reply With Quote
Old 06-02-2007, 11:17 AM   #5
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 that I missed that question the first time. Like the others, I used just under 8 quarts each time I changed mine.
Archon is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Gas Milage Database... Need info! bmsgaffer86 General GM Chat 18 05-27-2004 07:11 PM
1999 Bonneville Sle gettin horrible gas milage wasnotwas25 1992-1999 3 01-17-2004 11:51 PM
gas milage GAMEOVER 1992-1999 3 10-15-2003 02:15 PM
180-tstat and gas milage randallons General GM Chat 8 08-19-2003 04:17 PM
GAS MILAGE?! zzzzzeke 1992-1999 2 12-22-2002 01:24 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 07:24 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.