Class of 2012
07-24-2012, 09:54 AM
#251
JK Newbie
Join Date: Jan 2012
Location: San Diego
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MPG? Engine issue?
Ok I got to ask if anyone else is getting >16mpg @ 2k rpms on their pentastar?
Disclaimer: I know Jeeps aren't hybrids and I don't care if I'm only going to get 12mpg I just want to make sure it isn't an engine issue.
I just drove a whole tank at less than 60mpg (a little less than 2k rpms) all freeway and still netted less than 16mpg
(yes hand calc'd not the jeep electronic guestimate). I'm starting to wonder if this is an engine issue. I have a JKUR Auto with 4.1 gears, and 5,500mi on her.
Disclaimer: I know Jeeps aren't hybrids and I don't care if I'm only going to get 12mpg I just want to make sure it isn't an engine issue.I just drove a whole tank at less than 60mpg (a little less than 2k rpms) all freeway and still netted less than 16mpg
(yes hand calc'd not the jeep electronic guestimate). I'm starting to wonder if this is an engine issue. I have a JKUR Auto with 4.1 gears, and 5,500mi on her.
07-24-2012, 10:17 AM
#252
JK Enthusiast
Join Date: Nov 2011
Location: Spring, TX
Posts: 494
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Ok I got to ask if anyone else is getting >16mpg @ 2k rpms on their pentastar? Disclaimer: I know Jeeps aren't hybrids and I don't care if I'm only going to get 12mpg I just want to make sure it isn't an engine issue.
I just drove a whole tank at less than 60mpg (a little less than 2k rpms) all freeway and still netted less than 16mpg (yes hand calc'd not the jeep electronic guestimate). I'm starting to wonder if this is an engine issue. I have a JKUR Auto with 4.1 gears, and 5,500mi on her.
Disclaimer: I know Jeeps aren't hybrids and I don't care if I'm only going to get 12mpg I just want to make sure it isn't an engine issue.I just drove a whole tank at less than 60mpg (a little less than 2k rpms) all freeway and still netted less than 16mpg
(yes hand calc'd not the jeep electronic guestimate). I'm starting to wonder if this is an engine issue. I have a JKUR Auto with 4.1 gears, and 5,500mi on her.I can get 21 or better around 55-60mph. But I do have a manual, and after market wheels & tires for what its worth.
07-24-2012, 10:37 AM
#254
JK Enthusiast
Join Date: Jul 2010
Location: PHX, AZ
Posts: 140
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Originally Posted by maverick17
I hope to get a run in for the Crown King area (North of Phoenix) this week. Though its been raining off and on and I heard there were mud slides and such that have taken portions of the trail out. If they've got the area clear I may be able to get some real wheelin' in finally.
I'll try and get pics too...
07-24-2012, 11:08 AM
#255
JK Enthusiast
Join Date: May 2012
Location: Columbus, OH
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Originally Posted by JKbender
I have you beat... 112 miles on my test drive! I told the sales man that I needed to take it home to show the wife first, home was over 50 miles away.
07-24-2012, 11:33 AM
#256
JK Freak
Join Date: Feb 2012
Location: Chicago, IL
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Originally Posted by Bearjku
Stock sport. 321 gears getting around 20+ mpg with both city and highway driving. Almost 10,000 miles on her
I can tell you that how hard you leave the line and managing the shift points makes a big difference with jeeps. With an auto you should flutter the gas pedal around 23-2500 rpm to let the trans up shift when accelerating.
With the Rubi, your distance traveled per rpm is 17% worse than my Sport, so you should be getting 17-18 mpg using my numbers if we had similar driving pattern.
07-24-2012, 11:56 AM
#257
JK Enthusiast
If you don't mind, can you tell me what date your engine was built? You seem to have joined the unpopular pentastar replacement head club. Most of the engines that are in that club were produced around November of 2011. Are you familiar with the pentastar tic forums? The people in that forum heard their engines produce a loud ticking noise before their engine lights came on.
