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Jeep Grand Cherokee Real World MPG

Stever@EdmundsStever@Edmunds YooperlandPosts: 38,921
Please report your gas mileage for your Jeep Grand Cherokee here (include odometer reading, driving style, city/highway mix or anything else you think may help). Thanks!

Steve, Host


  • offeroffer Posts: 2
    I just got my new 2006 Grand Cherokee Overland with the Hemi and 4 wheel drive while I love my Jeep I am only getting 9 MPG! Anyone else getting gas mileage that bad?

  • brian211brian211 Posts: 69
    Welcome to the club. Have a 04 limited with the 4.7 8cyl HO engine. Computer says about 9.3 also. However, I just do city driving and its always in all wheel drive too. So its about normal for this car.
  • I have a 2005 GC Laredo with the 3.7 V6. I've got about 3500 miles on it. I do about 20% City driving and 80% highway. I can get about 20mpg highway, but my city is only 7-9mpg. I've been told that it should be 13-16 when I called several jeep dealerships in the surrounding area. I don't drive very aggresively. Recently I had a Dodge 1500 Quad Cab rental with the 4.7 V8 and I got 12mpg driving city (better than my V6 Jeep)when its rated for 14mpg.

    I've brought it to the dealership 4 times now and everytime they say "computer says system working to specification." I also had to have major work done on the transmission. Its been very dissapointing.

    I don't know how much luck I'll have, but I might try to pursue a lemon law. The truck is rated for 17 by the EPA (which I know uses unrealistic and outdated testing), but 7-9 is unacceptable for a V6.

    I've been keeping track of my mileage since I bought the car and every time I fill up I record the mileage, %highway, gallons of gas, actual mileage, and computer mileage. I've found that if I do straight highway, the computer is pretty accurate (within .5 to 1 mpg). However, as soon as I start doing city, the computer mileage is usually too high by 10-30% (e.g. Actual 12, Computer 15.7)

    I've always driven SUVs and expected so-so mileage, but this just doesn't seem right.
  • offeroffer Posts: 2
    Well I filled up the tank today and the computer is right on 9 MPG. All of that is city driving. I did take it on a road trip on the Freeways and I got 14.5 MPG
  • podedwardspodedwards Posts: 35
    I have a 2006 5.7 4WD Grand Cherokee. For the first 2,000 miles or so I averaged about (by computer and my own calculations)13.5 around town and averaged about 19+ in highway driving. I have about 6,000 now and I am averaging about 16+ in town and about 19+ on the highway. However, if I keep it on 65 I can easily average better than 21 on highway. I know it will improve a little more at about 10,000.

    I use 5W-20 Mobil 1 fully synthetic oil. I keep 40-42 psi in tires and I don't gun it (well almost never).

    I have a 2004 Mustang GT with a 4.6 v8. It easily gets 25-26 on he highway. On the other hand, if I want to make it rip and roar, I'll get about 10.

    The Hemi is the same way. This engine has lots of power and it takes a lot of gas to tap it fully. Powerful v8's do not have to be pushed as hard (more gas) because of the ample torque.

    I think driving easy is the key along with the right oil and tire pressure. Be sure you have at least 6,000 miles on it before you expect much.

    But, no one buys a 5.7 4WD Jeep Grand Cherokee looking for gas mileage or at least I didn't. It still gets better, at its worst, than the Suburb. and Tahoe I had.
  • bdmoore13bdmoore13 Posts: 4
    1996 Grand Cherokee V8. I get about 13.3 MPG, mostly city. I was only getting around 16 on the freeway, but with new plugs, wires, rotor, and cap, I am able to squeeze around 19-21 out of a gallon, as long as I keep my foot out of it (65-70 MPH).
  • podedwardspodedwards Posts: 35
    That sounds pretty good. The foreign models really don't get any better and some worse. A vehicle with a smaller engine will have to work harder to do the same job and will use as much or more gas.

    I think 21 is good for a 4WD jeep.
  • reholmesreholmes Posts: 8
    I get between 15 and 17mpg in mixed driving. I don't have an instantaneous readout on the computer like I had in all previous JGCLs, but on the level, no wind, 65mph, on cruise, I get 22-24 mpg reading after reset. Having said that, I'm a pretty conservative driver; although I did go off against a Nissan FX45 today and scalded his butt--hooah!

    I'm using 5-20 full synthetic and changing every 3000 miles, and thus my question. Chrysler recommends every 6000 miles on synthetic for the SRT8, but I can't find a recommended oil change interval on the 5.7 GCL--anyone know?
  • podedwardspodedwards Posts: 35
    There is an A and B schedule for oil change in the manual. However,I am old fashioned and I change oil every three thousand miles -rain or shine. It may not be necessary, but the relative costs for the life time of the vehicle is minimal.

    I use Mobil One 5-20 and I have used Mobil One in my others cars for years.

    Just traveled to our home in Grand Lake, CO from our home in Hattiesburg, MS pulling a fully loaded U-Haul and the Grand Cherokee crammed full. The 5.7 got nearly 19 and pulled the mountains with no effort.

    I am getting about 23-24+ on Interstate.

    It is a great car.
  • phoebe5phoebe5 Posts: 8
    I have an 05 GC Laredo, V8 4x4, bought May of 05. I was getting 9 mpg, but now I'm averaging 11 mpg, at 17k miles, 80% city driving. Interstate I get around 16. Extremely disappointed in this vehicle,and it is a lease so I'm stuck another 2 years. I test drove an 04 GC Limited for a week and averaged 16 in town and was promised when I bought the 05 that I could expect the same.
  • podedwardspodedwards Posts: 35
    Gas mileage is a product of several factors. There are mechanical reasons such as blocked filters, blocked exhaust or defective fuel systems.

    However, there are other more common factors that have to be eliminated first. So I suggest that (1) tires be aired up to max psi but allow for expansion with warm up. The best way is to air them up cold to max psi, drive to heat up the tires for about 20 minutuies and then let air out down to max psi, (2) drive conservatively-don't gun it at starts, speed up slowly and drive at the speed limit, (3) keep the oil changed @3000 miles with synthetic motor oil,(4)check to see if the air-conditioning compressor is staying on all the time, (5) buy good gas-not cheap gas, (6) replace the fuel filter.

    I have always gotten better than average gas mileage from all the cars I have driven and I think these habits really help.

    I am getting excellent gas mileage with my 5.7 Grand Cherokee, I have a 202 Dodge 1500 4.7 truck that continues to average between 18-19 and 22-23 on the road.

    2004 Mustang GT V8 that averages 22 and gets 26+ on the road (or less than 10 if I gun it-but it is worth it)

    A 2004 Ford V6 Windstar that averages 16 with 22 on the road.

    Driving habits usually determine potential gas mileage. A heavy foot is most often the culprit for poor gas mileage
  • transpowertranspower Posts: 182
    According to a review from England, the 2006 JGC CRD gets 21.6 mpg urban, 32.8 mpg extra urban, and 27.7 mpg combined. However, press reports for the forthcoming US model of the JGC CRD say that it will get just 19 mpg city and 23 mpg highway. So, what gives? Anyone here from the UK to give us a real world report?
  • Stever@EdmundsStever@Edmunds YooperlandPosts: 38,921
    Maybe those were Imperial (i.e. bigger) gallons? Tidester should be along shortly to do the math conversions for us. :D
  • transpowertranspower Posts: 182
    Interesting. 1 Imperial gallon = 1.201 American gallons. Therefore, under these terms (and I don't know if the UK really uses Imperial gallons), the UK JGC CRD would test at 18 mpg urban, 27.3 mpg extra urban, and 23 mpg combined. Still not the same as that reported for the American JGC CRD. Granted, there would be a difference in the methods between the UK and the US, but this much?
  • tidestertidester Posts: 10,110
    The Imperial system IS British! You have the right conversion factor meaning that you divide miles per imperial gallon by 1.201 to convert to miles per gallon. Alternatively, multiply by 5/6 (correct to 3 significant digits).

    Thanks for saving me the time to look it up! ;)

    tidester, host
  • transpowertranspower Posts: 182
    From Google, I found the following Web site:

    This confirms that, indeed, the British are still using Imperial gallons to compute mpg.
  • transpowertranspower Posts: 182
    The US JGC V-6 gets 17 mpg city, 21 mpg highway (EPA estimates). If we multiply these figures by 1.30 (30% better, the usual factor), then the projected economy of the US JGC V-6 CRD would be 22 mpg city, 27.3 mpg highway, and (presumably) 25 mpg combined.

    Of course, another factor is the price of Diesel fuel per gallon vs. the price of gasoline per gallon. In the winter, Diesel fuel is higher; in the summer, Diesel fuel is lower.
  • I just bought a 97 JGC Laredo 5.2 V8 and have been rather surprised with the mpg. I drive primarily on the hwy and regularly get 17 mpg as long as I drive the speed limit and set the cruise.
  • I have an '04 GC Freedom with 4.7L HO and have added K&N FIPK and Flowmaster muffler and get 21 MPG (combined city and highway). My son has my old 2000 GC Laredo with 4.7L with K&N and gets almost 19 MPG and he is running Goodrich All terrain TAs, which tend to lower your MPG 1-2 MPG. We also live in Colorado at an elevation of 6500'.
  • My home is about 8,500 feet in Grand Lake, Co. My 2006 5.7 can use the lowest grade of regular above 2500 feet but I go back to a mid-grade when at our home in Mississippi which is 250 feet above sea level. MPG is about the same but there are some savings being able to use the less costly fuel.

    My 5.7 can loaf 95% of the time so it's not very hungry. But for those times I want to go fast or pull something very heavy, it is a hoot but hungry because of the extra work.
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