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 Post subject: Petrol KK Cherokee Fuel Consumption
PostPosted: Fri Dec 06, 2019 5:35 am 
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Hello All

A mate of mine has recently purchased a 2010 KK Cherokee with 40,000ks on the clock. It’s the 3.7L Petrol, completely stock standard and its drinking (according to the LCD screen) over 19L/100. This is just basic city driving to and from work. Now from what I have read on other posts here, he should be getting closer to 16L/100 as he drives it like a grandma 95% of the time. He knew it wasn’t going to be fantastic consumption (that’s not why we buy Jeeps..) and it’s not a deal breaker for him but I'm wondering if anyone has any tips on what to do here…

The standard responses are usually, ‘Don’t be so heavy with the right foot’ etc which isn’t an issue in this case. Next tank he is going to try 98 octane to see if that helps but my experience with the JK, it wont do much. Does anyone have any other tips? I read somewhere there’s a chance (a small one, a very small one) that its programmed incorrectly (something to do with thinking its a diesel?)

Appreciate the help folks!

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 Post subject: Re: Petrol KK Cherokee Fuel Consumption
PostPosted: Fri Dec 06, 2019 2:26 pm 
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19 L/100km is 12.38 miles per gallon (US). This is typical for me to and from work in Philadelphia. I have a 13 mile commute (one way). I can cruise for part of my commute at 35 mph, which helps my average. When I'm in stop and go traffic in the city, I get about 8 mpg (29 L/100km). Keep in mind I'm running 31 inch tires without regearing.

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 Post subject: Re: Petrol KK Cherokee Fuel Consumption
PostPosted: Fri Dec 06, 2019 8:37 pm 
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lfhoward wrote:
19 L/100km is 12.38 miles per gallon (US). This is typical for me to and from work in Philadelphia. I have a 13 mile commute (one way). I can cruise for part of my commute at 35 mph, which helps my average. When I'm in stop and go traffic in the city, I get about 8 mpg (29 L/100km). Keep in mind I'm running 31 inch tires without regearing.


You must live close to me. I too drive to Philly almost every day for work and my single biggest complaint is the fuel mileage I get out of the 3.7. Last winter I got 11.72 miles per gallon which is insane because I always got 15 mpg when I was driving a lifted Tahoe with the 5.3 V8 and metal bumpers and around 17 mpg in my Trailblazer. I have standard size AT tires and the 2 inch OME lift. I have 2 other family members who have KJ's and they get around 12 mpg too. My cousin has a 5.7 Commander and he gets the same Mpg as I do. I love my KK I just don't understand how the Jeep gets such bad fuel mileage.


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 Post subject: Re: Petrol KK Cherokee Fuel Consumption
PostPosted: Sat Dec 07, 2019 12:40 am 
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I bet if the engineers were able to put a 4.7 in the Liberty it’s mileage would improve because a V8 wouldn’t have to work so hard to haul it down the road. This is particularly true in start-stop situations like we have in the city. The Liberty is a heavy beast of a truck, which makes it great at other things, like offroading without flexing the unibody. I read somewhere the reason the Liberty never had a V8 option was because it left no room for crush zones and reduced its crash-worthiness. It’s still a great truck, and I enjoy driving it. I have managed to gain back about 2 mpg by using a Scangauge which tells me my mpg as I drive, by fine tuning my driving style and choosing my best route as I commute to work. Using Waze has helped me avoid traffic as well, with the side effect of increasing my mileage.

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