running hotter more fuel efficient? - 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 08-12-2005, 04:31 PM   #1
Senior Member
Posts like a Corvette
Thread Starter
 
Join Date: Jun 2004
Location: Central NJ
Posts: 1,544
Thanks: 0
Thanked 0 Times in 0 Posts
NERV is on a distinguished road
Default running hotter more fuel efficient?

It'* been over 100 for the last 2 days and ive noticed that in the heat while my car is running between 200 and 220, it seems to be more fuel efficientcant hat be right?
NERV is offline   Reply With Quote
Old 08-12-2005, 04:44 PM   #2
Senior Member
Certified GM nut
 
Join Date: Sep 2003
Location: Reutlingen, Baden-Wurttemburg, Germany
Posts: 1,935
Thanks: 0
Thanked 0 Times in 0 Posts
Ryan is on a distinguished road
Default

Fuel vaporizes easier and thus burns more efficiently.
Ryan is offline   Reply With Quote
Old 08-12-2005, 04:54 PM   #3
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Nope.

Colder air is denser and therefore more efficient. You get more air and more fuel, which gives the engine more power, then keep your foot out of it, and the engine doesn't have to work as hard.

Colder air=greater performance and efficiency.
Hotter air=better emissions.
willwren is offline   Reply With Quote
Old 08-12-2005, 04:58 PM   #4
Senior Member
Certified Car Nut
 
Join Date: Jul 2003
Location: Robbinsdale, MN
Posts: 15,408
Thanks: 0
Thanked 0 Times in 0 Posts
MOS95B is on a distinguished road
Default

Quote:
Originally Posted by willwren
<snipped>
Hotter air=better emissions.
You know my wife???



sorry. back on topic......
MOS95B is offline   Reply With Quote
Old 08-12-2005, 06:32 PM   #5
BANNED
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
banned3800 is on a distinguished road
Default

With the Warm weather it takes no time at all for the engine to come up to temp.... Makes for better effiency...

Just remember I have done as much as 33mpg with a 180F T-Stat, in 45*F weather

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
banned3800 is offline   Reply With Quote
Old 08-12-2005, 06:39 PM   #6
Senior Member
True Car Nut
 
toastedoats's Avatar
 
Join Date: Sep 2004
Location: Fitchburg Ma _ToastedRice_
Posts: 6,837
Thanks: 0
Thanked 0 Times in 0 Posts
toastedoats is on a distinguished road
Default

warmer air= less dense air
means less fuel in the mix.. so in theory at idle, you would use less fuel... but when you get in on it, it would need more to make power
toastedoats is offline   Reply With Quote
Old 08-12-2005, 06:59 PM   #7
Sol
Senior Member
True Car Nut
 
Join Date: Sep 2002
Posts: 8,909
Thanks: 0
Thanked 0 Times in 0 Posts
Sol is on a distinguished road
Default

And with colder air, there is more fuel dumped in the engine...
Sol is offline   Reply With Quote
Old 08-12-2005, 07:10 PM   #8
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

There'* alot more to it. The more power POTENTIAL the engine has, the less hard it has to work to perform X amount of work.

Warming up QUICKLY is good for efficiency, as the car is running rich by design until operating temp is reached. But operating hot at all times is not good for efficiency.
willwren is offline   Reply With Quote
Old 08-12-2005, 07:14 PM   #9
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

This is going to become a light bulb changing thread.
BillBoost37 is offline   Reply With Quote
Old 08-12-2005, 08:24 PM   #10
Senior Member
Certified GM nut
 
Join Date: Sep 2003
Location: Reutlingen, Baden-Wurttemburg, Germany
Posts: 1,935
Thanks: 0
Thanked 0 Times in 0 Posts
Ryan is on a distinguished road
Default

Oops I totally didn't think that through...thus I now look like an idiot.

More completely vaporised fuel IS better...but warm air is is not....god I feel like a tool. Must be work rubbing off on me.
Ryan is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Fuel Efficient Spark Plugs... Yonkerse General GM Chat 11 09-09-2010 11:02 AM
Car is running hotter now, got really hot going up mountain haulin_ass 2000-2005 0 12-22-2007 10:53 PM
More efficient m62s (eaton's TVS™ design) 95naSTA Forced Induction 1 12-13-2006 03:38 PM
94 SSEi...running hotter than usual...and more! SynthDude2001 1992-1999 9 05-25-2005 08:02 AM
Engine running hotter h1081dan 1992-1999 10 08-10-2004 11:17 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 08:00 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.