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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

What is this discussion about? Jeep Grand Cherokee, Jeep, Fuel Efficiency (MPG), SUV


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#11 of 102
gas mileage by phoebe5
Jul 18, 2006 (8:20 am)
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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.
#12 of 102
Gas mileage by podedwards
Jul 18, 2006 (11:34 am)
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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
#13 of 102
Real World Mileage for CRD? by transpower
Jul 23, 2006 (5:03 pm)
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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?
#14 of 102
Re: Real World Mileage for CRD? [transpower] by steve_ HOST
Jul 23, 2006 (5:35 pm)
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Replying to: transpower (Jul 23, 2006 5:03 pm)

Maybe those were Imperial (i.e. bigger) gallons? Tidester should be along shortly to do the math conversions for us.
#15 of 102
Calculating with Imperial Gallons by transpower
Jul 23, 2006 (6:00 pm)
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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?
#16 of 102
Re: Calculating with Imperial Gallons [transpower] by tidester HOST
Jul 23, 2006 (7:39 pm)
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Replying to: transpower (Jul 23, 2006 6:00 pm)

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
#17 of 102
Still Imperial Gallons by transpower
Jul 24, 2006 (5:53 am)
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From Google, I found the following Web site:
 
http://www.vcacarfueldata.org.uk/faq/glossary.asp
 
This confirms that, indeed, the British are still using Imperial gallons to compute mpg.
#18 of 102
30% Better than Gasoline V-6 by transpower
Jul 25, 2006 (7:24 am)
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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.
#19 of 102
Re: Jeep Grand Cherokee: Real World MPG [steve_] by bwalker1028
Aug 30, 2006 (9:40 pm)
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Replying to: steve_ (Jun 17, 2006 1:52 pm)

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.
#20 of 102
Re: Terrible Gas mileage [offer] by warrenmj
Sep 10, 2006 (8:26 am)
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Replying to: offer (Jun 17, 2006 12:25 pm)

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'.

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