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  #25  
Old 04-17-2012, 07:27 AM
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Re: What kind of MPG should I be getting?

I have a v6 with K&N and 22" SRT Reps... I spend about 75% Highway 25% City and I get approximately 18.5 MPG. All depends on how you service it, drive it, and your mix of highway/city.
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  #26  
Old 04-17-2012, 07:46 PM
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Re: What kind of MPG should I be getting?

X2 on idling killing the EVIC mileage. I get 12-13 on 31.5" tires around town with the 5.7L and 18-19 on the highway.
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  #27  
Old 04-17-2012, 08:58 PM
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Re: What kind of MPG should I be getting?

Quick seafoam question, went to buy 2 cans at autozone and the guy there strongly suggested that I *not* use it. He claims seafoam is for 'homemade' engines and that if I care about my engine at all I should not put it in my gas tank, brake booster line or anything saying the V6 is far too weak to take that kind of abuse. Thoughts?
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  #28  
Old 05-05-2012, 02:35 PM
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Re: What kind of MPG should I be getting?

I've ran seafoam in several different vehicles in both the oil and through the gas. I change my oil after 50 miles of the seafoam being in there. Did it 30k miles ago in my WK and have no problems with it. Still running beautifully. If you run seafoam through it and don't change your oil before 100 miles, yea you're goin to have problems with it and when you see negative reviews on the stuff most of the time the reviewer didn't know enough to not leave it in there for very long. It's amazing how filthy that oil is after just 50 miles after running seafoam through it.
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  #29  
Old 05-05-2012, 02:39 PM
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Re: What kind of MPG should I be getting?

Also take what employees at Autozone, or O'reilly's, or anywhere have to say with a grain of salt. I once had an employee tell me there was no difference between orange and green engine coolant, and the only difference in any coolant was some was pre mixed with water and some wasn't. Yea, many know what they're talking about, but I would trust all the Jeep junkies on here a bit more.
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  #30  
Old 05-05-2012, 03:06 PM
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Re: What kind of MPG should I be getting?

im currently at 18.5 avg and that is with the summer wheels on. On the highway I can get up to 24issh depending on how im driving. I have a K&N intake, FR ported TB, power wire, and 91 octane tune.

I would definitely change all fluids, plugs and filter.
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  #31  
Old 05-07-2012, 10:55 AM
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Re: What kind of MPG should I be getting?

I have an '06 Laredo 3.7 w/ 55k and I was getting around 18-19 on the highway. I just swapped in new plugs over the weekend and I'm hitting 20-21 now. The gap on the old plugs was up to .055 so that made a huge difference. I'm curious to see what happens after I get my 2" RC lift and some 265/70's on there.
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  #32  
Old 05-08-2012, 08:15 PM
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Re: What kind of MPG should I be getting?

my hemi gets 22hwy driving easy.
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  #33  
Old 05-15-2012, 12:33 PM
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Re: What kind of MPG should I be getting?

Quote:
Originally Posted by lboggs24 View Post
I have a 06 WK w/ a 3.7L, I do mostly city driving, lots of starting and stopping. Recently tuned up, bosch iridium plugs, Royal Purple oil w/ K&N oil filter. I have a K&N FIPK, stock wheels/tires and i average 13-14 mpg. Prior to tune up I was averaging 11. My brother lives next door, and works the same place as me. He has a 07 w/ a 4.7, hasn't tuned it up for a long time and has the same commute, and he averages 16-17. His also has 20k more miles. I've read that the 3.7 gets the worst mileage for city. With barely 200hp, it really has to work to the the heavy WK moving. The 4.7 and Hemi do better city as far as I can tell.
From what I've heard on here about spark plugs, those iridium plugs may actually be hurting your mileage rather than helping. For whatever reason, the WK's run better on their stock type plugs rather than the platinum or iridium plugs. Do a search on here, it's highly recommended to stick with the stockers.

I have a 4.7 and I just did the seafoam treatment this weekend. 2/3 can in my tank and the other 1/3 in the vacuum line. Had all sorts of smoke come out! Unfortunately, I'm in the middle of a lift and have hit a stopping point (rusted lower control arm bolts) so I haven't gotten a chance to see my improvement in mileage yet. I usually get between 12.5 and 14 in the city and once got about 19.5 on the highway (only been on one longer road trip that was entirely highway). Until I hit 15city/20hwy, I'll keep looking for ways to improve it...
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  #34  
Old 07-25-2012, 11:10 PM
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Re: What kind of MPG should I be getting?

Quote:
Originally Posted by Muddy4DSM View Post
From what I've heard on here about spark plugs, those iridium plugs may actually be hurting your mileage rather than helping. For whatever reason, the WK's run better on their stock type plugs rather than the platinum or iridium plugs. Do a search on here, it's highly recommended to stick with the stockers.

I have a 4.7 and I just did the seafoam treatment this weekend. 2/3 can in my tank and the other 1/3 in the vacuum line. Had all sorts of smoke come out! Unfortunately, I'm in the middle of a lift and have hit a stopping point (rusted lower control arm bolts) so I haven't gotten a chance to see my improvement in mileage yet. I usually get between 12.5 and 14 in the city and once got about 19.5 on the highway (only been on one longer road trip that was entirely highway). Until I hit 15city/20hwy, I'll keep looking for ways to improve it...
Thanks for the info on the iridium, swapped them out for NGK Vpower, sure enough I'm up 2mpg. Also changed the front and rear diff fluid, not sure if that has anything to do with it. Either way, I'm happy.

Also, when I pulled the iridiums, the gaps had widened to around .55. They'd only been in there a couple months/few thousand miles and when they went in they were at .43. What would cause them to open so quickly?
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  #35  
Old 07-26-2012, 02:20 PM
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Re: What kind of MPG should I be getting?

all i can say is that i get the same damn mileage too. almost no highway mileage and floating around 10.4-11 mpg. I have an Airraid CAI and flyin ryan TB engine mods, everything else is aesthetic.
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