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Unread 10-27-2012, 10:07 AM   #1
guns+mud87
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libby gas mileage

Filled my tank full after running to almost empty. I noticed that I get better mpg when its full. Anyone else notice this? Second half of tank goes quick

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Unread 10-27-2012, 12:41 PM   #2
Poncherello
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Quote:
Originally Posted by guns+mud87
Filled my tank full after running to almost empty. I noticed that I get better mpg when its full. Anyone else notice this? Second half of tank goes quick
Reason for that, is that you have to compensate for the filler neck; not too certain how extra gas you hold there, but in some cases can be quite a bit. I just 20.11 mpg and my most recent 19.18 mpg all hwy. Hit some traffic and a bit more aggressive on the throttle with my most recent refill.
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Unread 10-28-2012, 02:31 PM   #3
jonrjen
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I find that at stop and go city driving as well as lower speed urban driving I get better MPG with the tow/haul activated. Plus, it is a heck of a lot more fun to drive!!!
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Unread 10-30-2012, 03:12 PM   #4
bagwell
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Quote:
Originally Posted by jonrjen View Post
I find that at stop and go city driving as well as lower speed urban driving I get better MPG with the tow/haul activated. Plus, it is a heck of a lot more fun to drive!!!
really....how so?
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Unread 10-30-2012, 04:57 PM   #5
jonrjen
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I don't know why the better MPG, maybe it make the RPMs hang in at a better power to speed or weight ratio. But, by the CPU causing the transmission to shift at different point in tow/haul mode there is none of that low RPM lugging or sluggish motion displayed.

Just give it a try and see if I am not correct. If you don't agree with me, come on back and say so. It won't be the first time I have been disagreed with, heck fire my Wife does all the time. But, it does give a much needed pep to the Liberty.
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Unread 11-03-2012, 08:33 PM   #6
bagwell
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Quote:
Originally Posted by jonrjen View Post
I don't know why the better MPG, maybe it make the RPMs hang in at a better power to speed or weight ratio. But, by the CPU causing the transmission to shift at different point in tow/haul mode there is none of that low RPM lugging or sluggish motion displayed.

Just give it a try and see if I am not correct. If you don't agree with me, come on back and say so. It won't be the first time I have been disagreed with, heck fire my Wife does all the time. But, it does give a much needed pep to the Liberty.
finally tried it....no likey ---- only noticed the higher shift points (at a steady 50mph it will still be in 3rd gear) , no performance increase.
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Unread 11-03-2012, 10:38 PM   #7
tommudd
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It will lock the OD out and will help at slower speeds and in town. It won't be trying to upshift all of the time
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Unread 11-04-2012, 08:15 AM   #8
jonrjen
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Keep in mind that I was speaking about running around traffic in town and urban settings. So I was talking speeds up to the neighborhood of 45 MPH. Once you are up to 50 MPH you most likely are not in a city/urban area or are speeding....LOL!!! I also have left the tow/haul turned on at speeds over 50 MPH if I am no a twisty road or with plenty of hills as to keep down on the multi shifting of the transmission searching for where it wants to be.
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Unread 11-06-2012, 06:38 AM   #9
Zak62592
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Usually average around 15.9 on a bad week or 16.5. Now that the winter gas has arrived it'll be even worse now.. sigh
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Unread 11-11-2012, 02:22 PM   #10
OPjhawk
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Quote:
Originally Posted by guns+mud87 View Post
Filled my tank full after running to almost empty. I noticed that I get better mpg when its full. Anyone else notice this? Second half of tank goes quick
How're you measuring mpg?
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Unread 11-11-2012, 08:12 PM   #11
atljeepkid
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I get about 15 around the city and held about 23 on the highway the other day. About a 50 mile trip.

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Unread 11-13-2012, 09:03 AM   #12
theotherone
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Quote:
Originally Posted by tommudd View Post
It will lock the OD out and will help at slower speeds and in town. It won't be trying to upshift all of the time
I tried this last week. Driving in town for me is brutal. It's all stop and go and you rarely get it up over 25mph. For such a backwards town in the middle of nowhere we have some serious traffic jams. I think it has a lot to do with a mix between a city that can't regulate traffic flow and drivers with an unregulated flow of pain pills in their systems. I can't think of a town with worse drivers anywhere, and I've really tried.

So the Liberty goes from 14mpg city to 16mpg city if I turn off the overdrive. I find myself staying out of the gas more as traffic lurches from red light to red light at every intersection, waiting for the car stalled in front of me to move, speeding up and slowing down as the driver in front of me randomly brakes and accelerates to avoid the flying sharks, oh the list goes on forever.

So I just click off the overdrive except for a stretch of four lane where we might get up to 40 or 50 if the old mini-van leading the parade can keep on the gas.

Thanks for the tip!
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Unread 11-15-2012, 02:26 PM   #13
mblackwell
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tow haul or not tow haul

I used the tow haul last week commuting to work got 18.8 in stop and go. I did a 233 mile trip this weekend w/o tow haul, mostly rural 2 lane highway, 21.1 calculated by (meter/calculator).
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Unread 12-03-2012, 08:52 PM   #14
backinblack
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I'm chugging out 16 mpg city...costs about $60 a week. No complaints as my other vehicle option was a RAM 1500, a real gaz guzzler. Think I'll try the tow mode though and see what happens.
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Unread 12-05-2012, 06:56 AM   #15
rescue575
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I have read that using the tow/haul mode helps improve gas mileage, but my question is will it cause any long term issues if it is constantly used when not actually towing?

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