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getting poor gas mileage on a hemi

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Old Oct 9, 2010 | 11:47 AM
  #21  
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oh the privilege of poor gas millage.... aint that why we drive dodge trucks,for poor gas millage and the sexyness hahaha but i am gettin 12 city and 14.5 highway
 
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Old Oct 9, 2010 | 12:20 PM
  #22  
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13.5 is not that bad. Like other said, keep up with the maintenance, plugs, oil, trans fluid and diffs. Also, make sure your tires are properly inflated and everything is in alignment.

Also, your right foot has as much to do with mileage as anything. I know if I drive my truck like a sane person (which is not often) I can get 16 combine, mostly city. However, the way I normally drive I get 12.5, but I drive my truck like I stole it
 
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Old Oct 9, 2010 | 03:03 PM
  #23  
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I think my truck gets worse gas mileage than any Hemi i've seen haha.
10 city 12-14 highway

Its a 2003 4x4 Hemi with a 4" lift and 35" Tires... It's been that ****ty since I bought it two years ago. I just thought it was one of the Hemi 'features'
 
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Old Oct 9, 2010 | 10:15 PM
  #24  
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9.8-10.1mpg ill trade
 
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Old Oct 10, 2010 | 12:45 AM
  #25  
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I used to be luck to see 11.5 when I first got my '03, I was in the same boat thought something was def wrong. So, K&N CAI, NGK dbl plat plugs, SC prgrmr and now I avg 14.5/15 on the hwy (wind direction pending) and around 13 or so city runnin 285 bfgs
 

Last edited by KrzyKanuck; Oct 10, 2010 at 12:59 AM.
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Old Aug 6, 2012 | 09:01 PM
  #26  
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i have 05 5.7 hemi quad w/20" wheels and 80,000 miles and used to get 17+ mpg highway but has now dropped to 13mpg atnen best on hwy. Seemed to have lost mpg in very short amount of time (3,000 miles ago). Any one with suggestions. P.S. Just joined forum today. Hi everybody.
 
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Old Aug 6, 2012 | 09:10 PM
  #27  
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Originally Posted by jbird05
i have 05 5.7 hemi quad w/20" wheels and 80,000 miles and used to get 17+ mpg highway but has now dropped to 13mpg atnen best on hwy. Seemed to have lost mpg in very short amount of time (3,000 miles ago). Any one with suggestions. P.S. Just joined forum today. Hi everybody.
Welcome to the site? Replace air filter? Spark plugs? O2 sensors? EGR? Air pressure in tires? Reset PCM?
 
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Old Aug 6, 2012 | 09:37 PM
  #28  
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Yea make sure you guys check those EGR valves. Especially the 03 guys. I hear that thing robs mileage big time. I only see about 9-10 in the city but thats ALOT of stop and go and 17-18 on the highway doing 70-75
 
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Old Aug 6, 2012 | 09:56 PM
  #29  
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Tune up, EGR as stated and clean the throttle body. A clogged EGR and gummed up throttle body could rob 2-3 MPG by themselves...
 
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Old Aug 6, 2012 | 10:09 PM
  #30  
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Originally Posted by jbird05
i have 05 5.7 hemi quad w/20" wheels and 80,000 miles and used to get 17+ mpg highway but has now dropped to 13mpg atnen best on hwy. Seemed to have lost mpg in very short amount of time (3,000 miles ago). Any one with suggestions. P.S. Just joined forum today. Hi everybody.

I'd definately check the plugs. Have you ever changed them? Air filter might need changing Tires might be underinflated,,,Check all the small maintenance stuff
 
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