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Discussion Starter #1
I just needed to vent. I am simply not getting the MPG I thought I would with this vehicle. I avg. 19.5 MPG!!!! I do mostly city driving with hills etc. 2011 Compass 4x4 Lat. with 15,000 miles on it. I get oil changes regularly as well. What can I do? Any one else experiencing this?

Thanks!
 

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The computer controls everything. Plugs and air filter would not be an issue at that millage. Those are all you can change that might (thats a might) change the millage for mixed city driving. You can look at the air filter but unless you've been driving in very dusty areas a lot. Checking it will not show any note worthy accumulation.

You can ask the dealer to check the vehicle for that next time you take it in. I expressed concern in mine and nothing has brought it to where I'd expect it to be in Hwy driving. Do a highway check and calulate if based on the amount of fuel you put back after driving some Hwy distance and see what that says.
 

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quick question. How are you calculating the mileage, manually or are you going by what the dashboard is saying?
 

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Dashboard.
Ok do me a favor, do it manually.
Step one: Fill up your gas tank.
Step two: Reset the trip on your gauge to Zero miles.
Step three: Drive around until the next time you need gas.
Step Four: Fill up you gas tank again but this time make a note of how many gallons you put into the car to fill it up.
Step Five: Look at your trip gauge, divide that by the amount of gallons that you just put into your car. That will give you the exact MPGs your car is making.

With that being said, you live in CT and COLD winter temps will hurt your gas mileage big time. For example i get an average of 25-26MPGs with half city/highway travel in the summer time and in the winter time i only get 22-24.

Do it manually and we will see what you get. If its the same, i might have a trick that can help you.
 

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I check mine manually and get average of 19.6. MPG with 50/50 city/hway. 2007 with 87k. Changed air filter, plugs, oil, coolant and diff oils. Tires up to spec and try to drive gently.
^What is that trick?
 

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Alot of people of the other jeep/dodge forums claim this works on their cars. It resets the ECM and the gas mileage goes back up.

1# turn ignition to on position do not start the car.
2# depress accelerator slowly till it goes all the way down ( this should take aprox. 10 seconds)
3# hold for a couple of seconds then start releasing (letting the peddel up)
slowly (this should also take aprox 10 seconds)
4# when peddle is fully realeased wait a couple of seconds and turn off the igniton key off for at least 1 minute
5# now the ECU is reset to a learn mode and it will learn to drive the way you drive.

I've never had to try this because my MPGs have always stayed above 24 MPGs.
 

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Discussion Starter #8
I will try that. I am in the process of manually estimating my MPG. Thanks!
 

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I will try that too. Just filled up and got 18.6 MPGs.

Also wouldn't disconnecting the negative terminal and pulling the ECU fuse or main power fuse clear the ECU or not put it in "learn" mode.
 

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Your average is not too much. I do not know your engine/transmission but with my 2.4+CVT when I do only city driving, my average is less 15 MPG (15.7 l/100 km manualy calculate). This week-end, I do only highway driving and my dashboard show me an average of more 24 MPG (9.8 l/100 km) but I will confirm when I will fill up the tank.
 

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Also wouldn't disconnecting the negative terminal and pulling the ECU fuse or main power fuse clear the ECU or not put it in "learn" mode.
from what i understand, no. Its not like the good old days where unplugging the power for an hour or so will reset the ECU.:(
 

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With only 5000kms on the odo i'm getting 11.2L/100kms or 21mpg US

That is 100% city driving, and it is still quite cold here (SK so around 5-10c still)

I also have FDII which is supposed to hurt the economy more, I just drive conservative and don't hammer on the gas, with the cvt its really easy to get good mileage, I also have a scanguage to track my real time mpg so I can see that effects my driving habits have on mileage.
 

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I know I do not have the exact model you guys do...I have a 2011 2.0 2wd Manual. I now have 8000 miles on it. I do primarily highway. 65MPH 98% of the time. I get 30-32MPG consistently. Now every once in a while I will drive primarily City. And it drops the MPG down to 27. But I use hypermiling techniques to get there. Just the normal ones not the drastic ones.

Note: That is manual calculation no computer. (I do not have the Jeep one anyway) I do have a scangauge II which helps hypermiling.

I have noticed (Especially with the newer cars) My wife has a CRV 2010 - and it is all about how you drive it. Any lead foot driving at all will drastically reduce MPG.
 

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Yesterday I filled up the tank. My average is 10,06 l/100km or 23,5MPG.
 

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This may seem dumb, but the quality of the fuel has a bit to do with economy.

Also, when you guys manually check your mpgs, would that work in winter given that I warm up the car (it's -25 C in the morning) for about 5 mins every day. There's no way to factor that in. My winter mileage, city only, is sometimes down to 16 l/100km (14 mpg, EVIC reading) due to the warming up...but I can only get about 19.5 (EVIC) for city driving in warm weather... Mind you fuel in this country is generally of a lower grade than in the west, so that doesn't help either.

I just figure it's a gas-guzzling yank-tank and you don't drive it for the fuel economy, well I don't anyway. Surely a japanese tin-foil car would be better for that lol...
 

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Well I finally broke the 30MPG mark with a solid 31MPG driving to from the same destination. I doubt the weather has anything to do with it as its been cool the days sometimes in the mid teens. I did get a flash update a week ago when checking for a front end noise which was a normal diff noise. I attribute it to that flash update.
It was almost 32MPG and could hit that it I backed off some on the trottle.

But that was a pleasent surprise. I had to double check my entries to be sure.
 

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This may seem dumb, but the quality of the fuel has a bit to do with economy.

Also, when you guys manually check your mpgs, would that work in winter given that I warm up the car (it's -25 C in the morning) for about 5 mins every day. There's no way to factor that in. My winter mileage, city only, is sometimes down to 16 l/100km (14 mpg, EVIC reading) due to the warming up...but I can only get about 19.5 (EVIC) for city driving in warm weather... Mind you fuel in this country is generally of a lower grade than in the west, so that doesn't help either.

I just figure it's a gas-guzzling yank-tank and you don't drive it for the fuel economy, well I don't anyway. Surely a japanese tin-foil car would be better for that lol...

On my scanguaugeII it takes into account idling, and it does make a big difference in fuel economy
 

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tripplec - can I just go to the dealership and ask for a flash update on my computer? I need the MPGS that you just got badly. I can't break 20 MPG at all, no matter how I drive.
 

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tripplec - can I just go to the dealership and ask for a flash update on my computer? I need the MPGS that you just got badly. I can't break 20 MPG at all, no matter how I drive.
yeah you can, if its under warranty then its free. Just ask them to check for computer updates for the car. I had it done on mine. There's a post here some where... ah here it ispcm tcm update
 

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This weekend I checked mine. I filled after about 60 miles of driving. 40 was highway at about 70 mph and the rest was in town driving. It figured out to about 25 mph, which I didn't think was too shabby. I have the 2.4 4WD automatic. I have about 3500 miles on the Jeep as of right now. What is the tank size on these things? Is it around 13 gallons??
 
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