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Unread 05-14-2012, 02:23 PM   #1
coloradoboy
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Gas Mileage

hey anyone have any ideas to get better gas mileage in my little brothers 2005 WK with a 5.7 Hemi, Thanks for your input

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Unread 05-14-2012, 04:03 PM   #2
mykdee311
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Put a spoiler on it

Intake, exhaust, chip, clean air filter, tire pressure, change driving habits, eliminate idle time, brake less coast more.
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Unread 05-14-2012, 05:08 PM   #3
AJeepZJ
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It would help to know what he's already done to it, including the condition of the Jeep.
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Unread 05-14-2012, 06:42 PM   #4
Rob 99TJ
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Update all fluids and filters. Air up tires to max pressure. Accelerate and drive slower. Change out EGR, MAP, PCV, O2 sensors. Don't lift it or put big tires on it.
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Unread 05-14-2012, 06:42 PM   #5
90grandoneer
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X2 on all of the above, especially the maintenance/tune status/mileage of the vehicle. What octane fuel is he using? He's located at over 6000 ft. elevation, and probably should be running 85 or 87 fuel, depending on mods., if any. Running higher octane fuel than needed is a waste of $$$ and can also reduce power output. Fuel economy at that altitude MAY be a little worse than those at sea level, because the engine is making less power. All the things mykdee311 said are particularly important.
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Unread 05-14-2012, 10:01 PM   #6
coloradoboy
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Well he has a K&N drop in intake, synthetic oil Mobil 1, K&N oil Filter, New fuel filter, and thats about it, he is getting about 14.4 according to the on board computer, the jeep just rolled 89,000 miles, the jeep has been babied since he has owned it looks and drives nicely, at least from what we can tell, honestly dont know a lot about these kind of jeeps I am an XJ and TJ person, he Runs 85 Octane
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Unread 05-15-2012, 06:00 AM   #7
AJeepZJ
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If he lives out in the mountains of Colorado, like your location says - I'm not sure his mileage will get much better. Things I would check? fluids, tires, alignment, spark plugs, airfilter (if it's filthy) Things to look into. Hypertech Max Energy Programmer, AirRam Power Wire, Ported Throttlebody.

What kind of gas mileage was he getting before?
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Unread 05-15-2012, 06:26 AM   #8
coloradoboy
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when my mom had one she got around 18.5-19.2.
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Unread 05-15-2012, 07:12 AM   #9
AJeepZJ
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Yeah, I'm just get'n that right now with my heavy a$$.
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Unread 05-15-2012, 08:45 AM   #10
longboy
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Quote:
Originally Posted by coloradoboy View Post
when my mom had one she got around 18.5-19.2.
Different types of driving?

With my 5.7 HEMI in Colorado, I have been getting about 16.5 average. I do about 90% highway at 70mph, and the rest is in-town driving with stoplights, etc. I drive about 45 miles a day on average.

I can eek out about 19/20 on a road trip, but that's usually the best I can do.
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Unread 05-15-2012, 09:41 AM   #11
345jeep
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His mileage looks pretty good to me under the circumstances.
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Unread 05-16-2012, 08:49 PM   #12
HurriJeff
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Where and how you drive will affect your mileage as much as the other stuff. I drive 4 miles each way to work and back and I get 10 MPG. Yes I use 18 gallons in 180 miles.And my computer says I get 10MPG average. Here's the break down....4 miles, 16 traffic lights/ stop signs, long traffic lights, waiting at drop off zone at elementary school. Virtually no highway miles to improve average. If you get 12 to 14... be glad not sad
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Unread 05-16-2012, 10:16 PM   #13
mykdee311
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I agree that mileage sounds about right for around town driving with a little freeway
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Unread 05-17-2012, 01:15 AM   #14
fright88
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Is 14.4 all highway all city or mix? I've only had my WK for about a month but I have been averaging about 13-14 city 17-18 highway at 75 mph and 18-19 highwy at 65
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Unread 05-17-2012, 06:50 AM   #15
coloradoboy
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85% highway 15% city
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