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Unread 07-11-2014, 10:52 PM   #16
DEF1ANT
Registered User
2014 MK Compass 
 
Join Date: May 2013
Location: , OR
Posts: 25
I got a 2014 Compass 4x4 limited and I drove it hard for its first 1000 miles. I used the manual shift a lot as its also good to let the engine decelerate after some full throttle runs. After an oil change I would get about 18 average mpg on city and 22 on highway. At 5000 miles the engine got quieter and more responsive with 19 average mpg on city and 23 highway. I then replaced the air filter with a K&N and now I'm getting almost 21 average mpg city and 25 highway.

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Unread 07-15-2014, 05:07 PM   #17
d0mm0
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2014 MK Patriot 
 
Join Date: Jul 2014
Location: farmingdale, new york
Posts: 5
so i got a question? My jeep is new and has 300 miles on it right now....after reading this post I'm not "babying" the engine anymore...now with that loud rumbling and noise when i step on it, that goes away after a certain amour of "miles" has been driven? Just curious as this is the first new car i have ever had! Thanks in advance
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Unread 07-24-2014, 11:30 AM   #18
Katmandu
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2013 JK Wrangler 
 
Join Date: Aug 2005
Location: Troy, Ohio
Posts: 378
Quote:
Originally Posted by d0mm0 View Post
so i got a question? My jeep is new and has 300 miles on it right now....after reading this post I'm not "babying" the engine anymore...now with that loud rumbling and noise when i step on it, that goes away after a certain amour of "miles" has been driven?
I addressed that loud rubbling/growling noise in my 14's engine when it was new. I was VERY unhappy with it (the 2.4 engine) in the begining.

The growling/rubbling noise (on acceleration) has pretty much completely disappated now. The noise really started to quite down I'd say around 3-4k miles. This is also the point at which the power increased substantially and the fuel economy also increase substantially as well.

I did not baby the engine when it was new and went WOT on highway On-ramps every change I got!
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Unread 07-26-2014, 03:22 PM   #19
Redpine
Registered User
2014 MK Patriot 
 
Join Date: May 2013
Location: , MIchigan
Posts: 29
I, too, followed Chrysler's owner manual break in procedure of occasional WOT. One recommendation though, do this AFTER the engine has been warmed up a bit. It's not good to do these shenanigans on a stone cold engine right after you pull out of your driveway in the morning.

Happy motoring.
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Unread 08-01-2014, 11:37 AM   #20
TeHpWNaG3
Registered User
2007 MK Patriot 
 
Join Date: Oct 2007
Location: Minnesota, USA
Posts: 44
Quote:
Originally Posted by Joey-G View Post

*snip*

I've since driven 100 miles all highway and gone through a half tank which is roughly 16 mpg i believe. I would never expect to get the actual window sticker estimates but that seemed alarmly low to me.

*snip*
I drive 75mph, 70 miles a day, to and from work. At that speed and distance, my Crown Vic (@4,000lbs; w/ 4.6L V8) actually beats my Pat in MPG, by a wide margin. Aerodynamics plays a huge part in fuel mileage. Keep in mind that the engine RPM required to sustain 75mph is about 3k on flat highway (depending on wind velocity and direction). Encounter a slight upward grade and the RPM can top 4.5K, no problem.

If I am tooling around town making quick stops here and there, the Jeep does much better then the CV, which should be what one should expect.
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