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SUVs Jeep Cherokee and Jeep Grand Cherokee Jeep Grand Cherokee Real World MPG
102 messages, Last post on Jan 04, 2009 at 10:46 PM
You are in the Jeep Cherokee and Jeep Grand Cherokee Forum. Your Hosts are steve_ & tidester
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Replying to: offer (Jun 17, 2006 12:25 pm)
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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 The truck is rated for 17 by the EPA (which I know uses unrealistic and outdated testing), but 7-9 is unacceptable for a V6.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. |
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Replying to: offer (Jun 17, 2006 12:25 pm) |
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Replying to: steve_ (Jun 17, 2006 1:52 pm) 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. |
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Replying to: steve_ (Jun 17, 2006 1:52 pm)
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Replying to: bdmoore13 (Jun 20, 2006 10:07 am) I think 21 is good for a 4WD jeep. |
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Replying to: steve_ (Jun 17, 2006 1:52 pm) 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?
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Replying to: reholmes (Jul 12, 2006 5:35 pm) 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. |
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| 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. | |
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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 |
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