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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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#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'.
#21 of 102
Fuel costs and milege by podedwards
Sep 10, 2006 (3:18 pm)
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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.
#22 of 102
Re: Real World Mileage for CRD? [transpower] by tomloy
Sep 15, 2006 (2:23 am)
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Replying to: transpower (Jul 23, 2006 5:03 pm)

The european version runs a 3.55 rear end ratio. Reports are the US version is running a 3.73 That accounts for the difference in gas mileage.

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