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post #1 of 55 (permalink) Old 02-14-2017, 08:21 PM Thread Starter
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Black Beauty

I introduced myself a couple days ago. Had her tinted yesterday. Second mod: K&N drop in filter.

I hope for no performance gains, but instead hwy MPG gains. I am disappointed so far in the fuel economy... Others have mentioned a possible software update, incorrectly being in 4wd, a break in period of 1,000 miles and then fuel economy comes. Anyone care to chime in? Either way, I thought the logo sticker looks way better than the ugly Stop! sticker.

I will continue to update here as I make changes to BB TH. I am thinking next to add red center caps and black lug nuts.
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post #2 of 55 (permalink) Old 02-14-2017, 08:38 PM
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You will see MPG gains as you break her in. When I got my KL it was January and cold, thus rear drive line was engaged most of the time so no FWD mode to save gas, along with winter gas, it made my mileage around 19. By the time Spring came around and warmer weather along with better fuel, I had some miles on it andI was averaging 24 MPG.
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post #3 of 55 (permalink) Old 02-14-2017, 09:22 PM
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K&N will not improve performance at all. Lets in more dirt too. Can also cause issues if you are too generous when reoiling after cleaning.

Unless the previous air filter was extremely dirty in which case you might notice a slight difference at WOT.

it works like this.

Computer knows how much air is coming in.. adds correct amount of gas.
the restriction point is the throttle body not the air filter.

Now if you want to put a K&N on a carb'ed vehicle it might perform as they announce on the box.
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post #4 of 55 (permalink) Old 02-14-2017, 11:47 PM Thread Starter
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As mentioned, not going for performance gains. I want to maximize my mpg on the hwy.
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post #5 of 55 (permalink) Old 02-15-2017, 04:44 AM
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When I purchased my TH last August, my in-town mileage was anywhere between 17 and 20, this with only 150+ miles on it from the drive from the donor dealer. This winter, it is hoovering between 13 and 16, which absolutely sucks when compared to my 2014 Journey Crossroad with the 3.6 and three rows; the mileage did not vary between summer and winter at all. The Dodge had the 6-speed auto and the Jeep the 9-speed, so I have to attribute it to the transmission holding the gears longer to warm the Jeep up quicker. I don't remember the weight of my Journey (based on the Avenger) but I can't imagine it being lighter than this Jeep. 14/16 was fine in my 5,000 pound Commander with the 4.7, but not this pint sized Jeep! Maybe I'll see an improvement once I install my aFe CAI.

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post #6 of 55 (permalink) Old 02-15-2017, 11:22 AM
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I noticed that when on the highway cruising at 65 in drive it only gets to 7th gear (switched to manual to check). I started manually shifting it to 9th on the highway and have gotten 3 more mpg's on my work commute. was averaging 20 mpg, now averaging 23 mpg. Something to think about.
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post #7 of 55 (permalink) Old 02-15-2017, 11:41 AM
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Quote:
Originally Posted by HawkeyeKL View Post
I noticed that when on the highway cruising at 65 in drive it only gets to 7th gear (switched to manual to check). I started manually shifting it to 9th on the highway and have gotten 3 more mpg's on my work commute. was averaging 20 mpg, now averaging 23 mpg. Something to think about.


Switch to manual, see what gear it is in. BUT, watch the rpms as you manually shift to 8th then 9th. For me at best if goes into 8th and 9th is a fantasy readout on the dash.
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post #8 of 55 (permalink) Old 02-15-2017, 12:00 PM Thread Starter
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I just turned 300 miles, lol, so the engine has a bit left until it finds its groove. I think I'll get closer to 1k and swap the oil.

But how about the tires? In the past when buying new tires I actually take a hit from the start because they aren't perfectly rounded the and actually need to be worn in a bit to really roll with less difficulty. Possible?

Once the seattle rain quit also I'm going to paint the calipers red with the duplicolor kit.
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post #9 of 55 (permalink) Old 02-15-2017, 12:53 PM
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Originally Posted by dhh3 View Post
When I purchased my TH last August, my in-town mileage was anywhere between 17 and 20, this with only 150+ miles on it from the drive from the donor dealer. This winter, it is hoovering between 13 and 16, which absolutely sucks when compared to my 2014 Journey Crossroad with the 3.6 and three rows; the mileage did not vary between summer and winter at all. The Dodge had the 6-speed auto and the Jeep the 9-speed, so I have to attribute it to the transmission holding the gears longer to warm the Jeep up quicker. I don't remember the weight of my Journey (based on the Avenger) but I can't imagine it being lighter than this Jeep. 14/16 was fine in my 5,000 pound Commander with the 4.7, but not this pint sized Jeep! Maybe I'll see an improvement once I install my aFe CAI.

That seems abnormally low unless you're using the remote start feature a lot, but then you'd have to be using it all the time. How many miles on on your TH now?
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post #10 of 55 (permalink) Old 02-15-2017, 01:08 PM
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Quote:
Originally Posted by dhh3 View Post
When I purchased my TH last August, my in-town mileage was anywhere between 17 and 20, this with only 150+ miles on it from the drive from the donor dealer. This winter, it is hoovering between 13 and 16, which absolutely sucks when compared to my 2014 Journey Crossroad with the 3.6 and three rows; the mileage did not vary between summer and winter at all. The Dodge had the 6-speed auto and the Jeep the 9-speed, so I have to attribute it to the transmission holding the gears longer to warm the Jeep up quicker. I don't remember the weight of my Journey (based on the Avenger) but I can't imagine it being lighter than this Jeep. 14/16 was fine in my 5,000 pound Commander with the 4.7, but not this pint sized Jeep! Maybe I'll see an improvement once I install my aFe CAI.
The difference between the Journey and the Cherokee, I believe, is the drivetrain (the all wheel drive system). On the Cherokee, AWD engages partially as soon as outside temps dip below 40F. That's roughly a 15% hit on fuel economy right there.
As for winter vs summer, it depends how cold it gets where you live/drive. Here where I am, with the cold winters, I get a 30-40% hit on fuel ecnonmy on this Cherokee, and I got the same with my two previous Libertys. Some of that is my right foot (I love spirited winter driving...), but most of it is 4WD and cold rotating parts. The more complex the drivetrain, the more friction from cold bearings/thick grease you get, and fuel mileage goes South. If your system does not engage the rear drive shaft in winter by default, then mileage hit is drastically reduced.

Quote:
Originally Posted by HawkeyeKL View Post
I noticed that when on the highway cruising at 65 in drive it only gets to 7th gear (switched to manual to check). I started manually shifting it to 9th on the highway and have gotten 3 more mpg's on my work commute. was averaging 20 mpg, now averaging 23 mpg. Something to think about.
Our Cherokees' tranny cannot by manually upshifted, only downshifted. Moving up the gear count only sets that gear as highest available, when/if the computer decides to use it.
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