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Unread 11-08-2011, 08:54 AM   #1
patriot2009bk
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2009 MK Patriot 
 
Join Date: Oct 2011
Location: Fayetteville, NC
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Mpg

This weekend I took a 375 mile trip to the mountains. I recorded my actual mpg before a fillup. I was averaging 22.5 mpg highway with some city usually at a constant speed between 45-60.
While on the way to the mountains, 90% highway I stayed between 60-75, and got around 27.5 mpg..
So my question is.. why the huge difference?

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Unread 11-08-2011, 09:56 AM   #2
tjkj2002
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The closer you get to the peak torque the more efficient your engine get's.Higher engine rpm's does not mean worse mpg's,to a point.
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Unread 11-08-2011, 11:48 AM   #3
FujativeOCR
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Ive had huge discrepencies on the exact same flat highway from 18 to 24 mpg. The difference was a headwind in the morning and tailwind at night. Also going up vs. Going downhill.

On a sidenote...I only wish my Patriot would ever do 27.5. The best ive got was 26 going exclusively 45-55 mph.
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Unread 11-08-2011, 12:52 PM   #4
patriot2009bk
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Quote:
Originally Posted by FujativeOCR
Ive had huge discrepencies on the exact same flat highway from 18 to 24 mpg. The difference was a headwind in the morning and tailwind at night. Also going up vs. Going downhill.

On a sidenote...I only wish my Patriot would ever do 27.5. The best ive got was 26 going exclusively 45-55 mph.
It was headwind on the way down there, Almost 200 miles of going through mountain highways(up and down mtns) through the blue ridge parkway.. def not a flat highway.. that's why I'm pretty clueless right now as to why my gas mileage was this good.

Also, while driving on winding mountain roads 35-45 I still kept the same mileage.
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Unread 11-09-2011, 08:26 AM   #5
Gramps
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Here's my mileage on a road trip we did back in '06.
http://www.jeepforum.com/forum/f98/c...ml#post2615845
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Unread 11-09-2011, 08:41 AM   #6
patriot2009bk
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Quote:
Originally Posted by Gramps
Here's my mileage on a road trip we did back in '06.
http://www.jeepforum.com/forum/f98/c...ml#post2615845
That's a pretty detailed mileage report gramps. Very similar to my travel mpg just not quite as far.

Update on my gas mileage: now getting close to 26 mpg avg. after another fill up after getting home from the mountains.
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