Improving MPG on my Jeep Grand Cherokee - Page 3 - JeepForum.com
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post #31 of 55 Old 09-02-2011, 07:13 PM
joccomalone
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2006 FSJ Cherokee 
 
Join Date: Sep 2011
Location: huber
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I used to drive to work in CA, 20 miles one way, lots of hilly terrain. I got around 18-19 MPG. I changed the air filer to a K&N and made my new mileage to about 20 MPG. it might not be much on the mileage but I can also feel a difference in the get up and go. I now live in NC and I hate the place so much I tend to have a heavy foot. what is it about some people and their kids?

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post #32 of 55 Old 09-02-2011, 07:17 PM
ZJ5point2GCL
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1998 ZJ 
 
Join Date: Oct 2009
Location: Calgary
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first of all, what do you consider bad gas milage? cause the other day i hit double digits and got rather excited, near about kissed my passenger.

98 Deep Slate Niner- 6''s on 35's ---11 F150 Platinum Pearl White- Modded Tiny V6 with Two Turbos. ---93 Black 5.2 limited- Slowly dying in my Parents Driveway
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post #33 of 55 Old 09-02-2011, 08:39 PM
PolkaPower
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1998 ZJ 
 
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Location: The Abyss
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I speed up and then let off the gas and watch the instant reading go to the 40's.
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post #34 of 55 Old 01-12-2012, 10:24 AM
klindzy3
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2000 WJ 
 
Join Date: Nov 2011
Location: South Bend
Posts: 5
What kind of spark plugs do you guys suggest? and any other things you think i can do to improve gas milage. IDC what it is really but the more the better.
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post #35 of 55 Old 01-12-2012, 10:41 AM
xxmikewalshxx
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1997 ZJ 
 
Join Date: Oct 2011
Location: Plains
Posts: 139
Alas, another where does my gas go post, I've grown fond of them. Some ideas not mentioned often enough, attach a large sail, I here sailing is quite relaxing. I invested in a Newfoundland puppy, he's just turned a year old, I'm going to fit him with a harnes when he hits 130lbs. Hey, if they could pull a ship to shore in storm tossed seas, think of the gas I'll save saying, mush! Enjoy the ride, it's a Jeep.
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post #36 of 55 Old 01-12-2012, 12:42 PM
PolkaPower
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1998 ZJ 
 
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Location: The Abyss
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Quote:
Originally Posted by xxmikewalshxx View Post
Alas, another where does my gas go post, I've grown fond of them. Some ideas not mentioned often enough, attach a large sail, I here sailing is quite relaxing. I invested in a Newfoundland puppy, he's just turned a year old, I'm going to fit him with a harnes when he hits 130lbs. Hey, if they could pull a ship to shore in storm tossed seas, think of the gas I'll save saying, mush! Enjoy the ride, it's a Jeep.
Wow you got used to them fast since you only just joined. Use the Champion coppers or Autolite plugs. It will tell you what plugs on the stickers that are on top of the radiator. Tune up, oil changes, proper tire inflation, proper maintenance. Those are all you can do for mileage on vehicles this old.
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post #37 of 55 Old 01-13-2012, 06:15 AM
xxmikewalshxx
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Join Date: Oct 2011
Location: Plains
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Quote:
Originally Posted by PolkaPower View Post
Wow you got used to them fast since you only just joined. Use the Champion coppers or Autolite plugs. It will tell you what plugs on the stickers that are on top of the radiator. Tune up, oil changes, proper tire inflation, proper maintenance. Those are all you can do for mileage on vehicles this old.
Sure, pick on the new guy. If I had feelings, I would cry.
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post #38 of 55 Old 01-13-2012, 10:12 AM
zander21510
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1995 ZJ 
 
Join Date: Jun 2011
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Injector swap can help. As said above, regular maintenance is key. And take it from the guy who got Bosch iridium plugs...same as coppers. Only difference is I probably won't ever have to change spark plugs again lol.
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post #39 of 55 Old 01-24-2012, 04:46 PM
Stepho113
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1998 XJ Cherokee 
 
Join Date: Jan 2012
Location: Daytona
Posts: 2
Im happy when I get 18mpg lol.

By the way you all are hilarious. Cracked up laughing at the wit some of you have.
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post #40 of 55 Old 01-24-2012, 04:49 PM
GaryE30
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1995 ZJ 
 
Join Date: Jan 2012
Location: Waldorf
Posts: 48
I get 18 mpg on average for 75% hwy. I just replaced a wheel bearing so I'm hoping it will improve EVER so slightly. Not bad though for a 210k Jeep.
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post #41 of 55 Old 01-24-2012, 04:54 PM
zander21510
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1995 ZJ 
 
Join Date: Jun 2011
Posts: 2,138
I get 16-17 at best with a mix of city and highway...though since I put my glasspack on I think I might be gettin better. I guess I'll see next fill up just how much of a difference it makes
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post #42 of 55 Old 01-25-2012, 12:21 AM
tizzly
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1994 ZJ 
 
Join Date: Jan 2012
Location: schenectady
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I say no to autolite on a 5.2. When I changed mine out the porclin on 5 of them crumbled. Champions now, 9mm spiral wires, 6a msd ignition modual, Frankenstein intake from old spare parts. Don't put a tube to your filter that connects to your grill and drive in deep water. Thrush muffler and striped the interior of the home for mold carpet. I'm gettin around 17 in stop and go and 23 on the highway. Drove from palm beach to ny for $220.00 and all my crap in the back
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post #43 of 55 Old 01-25-2012, 07:06 AM
joze
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On my 4.7 i usually get around 15 mpg. All stock. A few days ago i got the highest mpg ever since i own my jeep:19. Fuel filter, air filter and spark plugs will be changed in a few months (haven't replaced those yet and i don't know when the PO did).


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post #44 of 55 Old 05-22-2012, 01:59 PM
Spiritsuit7
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2003 WK 
 
Join Date: May 2012
Location: Hershey
Posts: 2
I regard the K&N air filter Highly

The first thing I do on all my vehicles is add a standard K&N air filter replacement (the kind that replaces the disposable air filters). I did the same to my Grand Cherokee and saw, and still see a 3 mpg increase city and almost a 5 mpg Highway increase. In other words, I get 17.5-18.4 mpg on my daily commute which is all stop and go type driving, and on long trips I get about 24 mpg. So was the $60 investment worth it. YES! Also it smooths out the idle and makes the engine much quieter. You will also feel a smoother pull in the torque range...I never put the pedal to the floor to engage the overdrive...I have more then enough torque depressing the pedal 25-40%. So I would say try the filter, I tell everyone to try them. I paid for mine in the first few fill ups. Now if only I could get my commuting mileage to 20 mpg consistently I'd be even happier. p.s I have Select Trac and the difference between Full Time 4x4 and 2WD is about 1 mpg...but who care when I can drive through the floods of 2011 to get home? (just me and the big trucks hahaha!! Oh yeah, don't drive through floods)
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post #45 of 55 Old 05-22-2012, 02:54 PM
PolkaPower
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Quote:
Originally Posted by Spiritsuit7 View Post
The first thing I do on all my vehicles is add a standard K&N air filter replacement (the kind that replaces the disposable air filters). I did the same to my Grand Cherokee and saw, and still see a 3 mpg increase city and almost a 5 mpg Highway increase. In other words, I get 17.5-18.4 mpg on my daily commute which is all stop and go type driving, and on long trips I get about 24 mpg. So was the $60 investment worth it. YES! Also it smooths out the idle and makes the engine much quieter. You will also feel a smoother pull in the torque range...I never put the pedal to the floor to engage the overdrive...I have more then enough torque depressing the pedal 25-40%. So I would say try the filter, I tell everyone to try them. I paid for mine in the first few fill ups. Now if only I could get my commuting mileage to 20 mpg consistently I'd be even happier. p.s I have Select Trac and the difference between Full Time 4x4 and 2WD is about 1 mpg...but who care when I can drive through the floods of 2011 to get home? (just me and the big trucks hahaha!! Oh yeah, don't drive through floods)
Balderdash.
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