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Unread 11-11-2010, 10:37 AM   #1
royhkeith
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2010 KK Liberty 
 
Join Date: Nov 2010
Location: Silver Springs, FL
Posts: 58
2WD or 4WD for best MPG?

I have 2010 Liberty with the Selec-Trac transfer case, thus I could use 4wd full time if I choose. Does anyone have any info on if I could expect any better MPG in 2wd than in 4wd for normal driving on developed/paved roads? Also, does any component in the drive train get more wear if 4wd is used full time?


Last edited by royhkeith; 11-11-2010 at 10:38 AM.. Reason: feft out a word
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Unread 11-11-2010, 10:41 AM   #2
robd2003
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2002 WJ 
 
Join Date: Feb 2010
Location: Vincennes, IN, IN
Posts: 1,340
yes things wear faster in 4wd.
yes you will get better mpg in 2wd
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Unread 11-11-2010, 10:57 AM   #3
tjkj2002
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2002 KJ Liberty 
 
Join Date: Dec 2009
Location: Colorado
Posts: 8,084
Quote:
Originally Posted by robd2003 View Post
yes things wear faster in 4wd.
yes you will get better mpg in 2wd
1st comment is false since your turning the front diff all the time anyways even in 2wd,just no torque is being sent to the front diff.

2nd comment is not entirely true either to a point,in fulltime 4wd you may see .5-1 mpg loss which is nothing compared to the mpg loss you get from the colder weather which can be as much as 5mpg's or more.
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Unread 11-11-2010, 04:02 PM   #4
Dave_B
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2008 KK Liberty 
 
Join Date: Dec 2007
Location: mlps
Posts: 201
2002 KJ Liberty is right, I forgot to flip it back to 2wd after pulling the boat out. I ran 250 miles at highway speed and lost about 1.5-2 mpg. The weather will have more of an effect when it is really cold. Yeah wear but I have a lifetime power train warranty. I live in Minnesota, sometimes I will leave it in 4wd for a week or more if the roads are bad. P.S. The remote car starter really kills the mileage!

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Unread 11-15-2010, 11:56 AM   #5
trek87
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1998 ZJ 
 
Join Date: Jan 2009
Posts: 4
Quote:
Originally Posted by royhkeith View Post
I have 2010 Liberty with the Selec-Trac transfer case, thus I could use 4wd full time if I choose. Does anyone have any info on if I could expect any better MPG in 2wd than in 4wd for normal driving on developed/paved roads? Also, does any component in the drive train get more wear if 4wd is used full time?
Unless road conditions are slippery, there's no need to be using 4WD on paved roads. However small the difference in gas mileage, it's still wasted gas in my opinion. 1 MPG is still 5% for a Liberty. There's also more wear on the front differential and the transfer case if 4WD is being used more often.
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Unread 12-20-2010, 01:45 PM   #6
crsantin
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Join Date: Jul 2010
Location: Toronto
Posts: 11
According to my trip computer, my 02 Liberty gets the same gas mileage in 2wd or 4 wd...lousy either way As far as driving in full time 4wd, I notice a huge difference in driveability. In 4wd it's much more stable and settled, it drives really nicely. In 2wd I'm not as confident in the handling, and I don't like rear wheel drive for short base suv's, not a good combination imo. I leave mine in 4wd all year long with no problems. I replace all my fluids very regularly.
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