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  #37  
Old 04-25-2011, 08:36 AM
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Re: Fuel economy 5.7 hemi

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Originally Posted by briteway View Post
How do you see it or fix the dragging brake issue?

I had a feel of my tires after a long trip and all the tires were a bit hot with the front ones being a bit hotter.

Feel the wheels, not the tires. The wheels should all be cool to the touch after a highway run, since you are not using the brakes like in city driving, and the air at high speed keeps the wheels cool. If a brake is dragging, that wheel will be very hot. If more than one of the wheels are hot, you may have a faulty master cylinder causing all the brakes to drag.
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  #38  
Old 04-25-2011, 07:29 PM
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Re: Fuel economy 5.7 hemi

OK thanks for that. I'll check that next time I hit up the highway
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  #39  
Old 04-26-2011, 01:27 PM
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Re: Fuel economy 5.7 hemi

'06 4WD - hilly western PA. 36 psi cold tire pressure. 14 mpg city stop and go. 20 mpg on rural highway (45-55 mph) and on interstate below 65 mph. 18 mpg on the interstate going 66 - 75 mph. All stock. 42,000 miles. Could use a throttle body cleaning, PVC, plugs, and EGR (on my list for next month). Redline synthetic in diffs. Mobil 1 Synthetic in engine. Usually don't worry about mpg's in the Jeep. The noisy shiny bike gets over 50 mpg and the 350Z gets 22 mpg city and up around 30 mpg on the interstate. Even the Subie isn't too bad at 24 mpg, pretty consistent no matter where I am. I'm rambling. I need a nap. Ugh.
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  #40  
Old 04-28-2011, 03:40 PM
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Re: Fuel economy 5.7 hemi

'06 4WD Overland and I got 19 mpg on a trip from Chicago to Minneapolis. I have the Superchips Flashpaq tuned to the 91 performance setting with the MDS is disabled. I love the way it drives in this setting.
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Old 04-29-2011, 08:36 AM
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Re: Fuel economy 5.7 hemi

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Originally Posted by 06ove View Post
'06 4WD Overland and I got 19 mpg on a trip from Chicago to Minneapolis. I have the Superchips Flashpaq tuned to the 91 performance setting with the MDS is disabled. I love the way it drives in this setting.
Does Superchips offer an 87 tune too ? are you running 93 or 89 on the 91 tune ?
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  #42  
Old 04-30-2011, 10:39 AM
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Re: Fuel economy 5.7 hemi

Speaking of Fuel Economy, has anyone ever RESET the fuel economy status and have it goe from (Ex. 12.1 mpg to 18.1 ) after hitting the reset button? I tend to do this occassionally and the #s change dramatically, especially Highway.
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  #43  
Old 04-30-2011, 03:32 PM
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Re: Fuel economy 5.7 hemi

i have an 05 5.7 and it averages 11 city and 15 highway
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Old 05-01-2011, 11:55 AM
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Re: Fuel economy 5.7 hemi

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Originally Posted by NyC-Hemi View Post
Speaking of Fuel Economy, has anyone ever RESET the fuel economy status and have it goe from (Ex. 12.1 mpg to 18.1 ) after hitting the reset button? I tend to do this occassionally and the #s change dramatically, especially Highway.
that's a average, so if you hit the button and drive easy it will be higher, on the hwy i'd expect it to jump that much, for sure
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  #45  
Old 05-04-2011, 10:11 PM
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Re: Fuel economy 5.7 hemi

So I took the Jeep to Boston this weekend, its about 175 miles away from where I live. I got about 15 mpg. I feel like I should be getting more though. My jeep has 29k and the hemi w/o the MDS. I put a K&N cold air intake(now realize I should have gotten afe) shortly after i bought the jeep. I thought that would help. Everything else is stock.

When I took to the dealer last week to have a TSB done I asked one of the service guys what i should be getting for mpg. He said I should be getting around 18 mpg. He also said at 30k miles is when it needs its first "big" tune up. I can't remember everything he said but mentioned spark plugs replaced and have 4x4 service done. He said some other things should get serviced but can't remember and to be honest didn't know if he was full of it and trying to get me to spend $. But he said that would improve my MPG.

Is this true what the service guy was saying? I don't know much about this so any info would be great. Would changing to an afe stage 2 intake help?
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  #46  
Old 05-05-2011, 01:13 AM
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Re: Fuel economy 5.7 hemi

DanD how fast where ya going ? i get 15ish if i go 80+.... at 65ish i get 18+..
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  #47  
Old 05-05-2011, 10:15 AM
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I was going about 75 the whole trip. It just seems weird how much mpg it varies from vehicle to vehicle. I know it depends on how you drive as well just seeing if anything is mechanically wrong.
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Old 05-05-2011, 06:50 PM
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Re: Fuel economy 5.7 hemi

If you keep the speed from 60 to 65 you will get better MPG. I usually keep 63 so i don't have to pass anyone and get 18+
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