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  #41  
Old 09-13-2013, 05:16 PM
Red-Stripe Red-Stripe is offline
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Just filled it an hour ago. 26.93 gallons, 538.0 miles= 19.98 mpg. Close enough to call it 20 mpg to me.
mostly back roads at 40-50 mph. Rarely over 60 so it doesn't get into 6th gear. I used to post about the bad 15-17 mpg in leaving it in eco mode. I think the gas has less ethanol lately contributing, but I noticed an immediate mileage increase after I left the battery disconnected over night. Always run 5w-20 dino oil.
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  #42  
Old 09-14-2013, 02:22 PM
roo roo is offline
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Quote:
Originally Posted by Red-Stripe View Post
Just filled it an hour ago. 26.93 gallons, 538.0 miles= 19.98 mpg. Close enough to call it 20 mpg to me.
mostly back roads at 40-50 mph. Rarely over 60 so it doesn't get into 6th gear. I used to post about the bad 15-17 mpg in leaving it in eco mode. I think the gas has less ethanol lately contributing, but I noticed an immediate mileage increase after I left the battery disconnected over night. Always run 5w-20 dino oil.
I have noticed a mileage increase lately, I thought it was because of some possible benefits after doing 200 miles on an 85 mph toll road. My truck seems to shift into 6th at about 62 (3.55's w/17's). How many others have noticed this? I haven't seen any other comments about this, you really have to be watching your speed and rpm closely.
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  #43  
Old 09-16-2013, 01:16 PM
Kelzan Kelzan is offline
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I have a 2012 1500 with a 6" lift with 35x12.5x20 tires and 3.55 gears. The truck also has an Airraid CAI. I have the Diablo Trinity T-1000 installed running the 91 octane tune. I use Shell V-power 91 octane fuel.

I just did a long trip through fairly hilly country and i set the cruise the whole way at 120 km/h which is roughly 75 mph. I used 100 liters of fuel and got 715 km out of her. My evic said i was averaging 14.5 L/100 km. I calculated it out to 16.82 MPG.
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  #44  
Old 11-19-2013, 08:59 PM
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Black Diamond 357 Black Diamond 357 is offline
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I have a 12 Laramie longhorn cc and I get 17.5 in the city and on the highway I get around 19.5. I drive the speed limit.
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  #45  
Old 11-21-2013, 10:58 PM
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13 all day long for me. 3.55 4x4. Love my truck but may have to get the ecodiesel couple years down the road. Mpg is my only complaint about the truck and I wish I had a 6 foot bed.
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  #46  
Old 01-01-2014, 03:08 PM
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PJRNM PJRNM is offline
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I average approximately 19 on the highway and my Hemi is stock. Went on an interstate trip last week with a strong headwind and it killed my norm. Got down to 14.8
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  #47  
Old 01-02-2014, 12:43 PM
titanman2789 titanman2789 is offline
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Quote:
Originally Posted by Red-Stripe View Post
Just filled it an hour ago. 26.93 gallons, 538.0 miles= 19.98 mpg. Close enough to call it 20 mpg to me.
mostly back roads at 40-50 mph. Rarely over 60 so it doesn't get into 6th gear. I used to post about the bad 15-17 mpg in leaving it in eco mode. I think the gas has less ethanol lately contributing, but I noticed an immediate mileage increase after I left the battery disconnected over night. Always run 5w-20 dino oil.
I don't know if you are running a tune or anything, but 45 mph for me is where my truck will shift into 6th if you're easy on it.
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  #48  
Old 01-02-2014, 06:23 PM
Red-Stripe Red-Stripe is offline
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Mine won't go to 6th until your over 60-62. The transengineer poster comfirmed this was programmed in ( I already griped about it on another thread).

Winter time. My 20 went down to 16
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  #49  
Old 01-02-2014, 08:00 PM
titanman2789 titanman2789 is offline
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Quote:
Originally Posted by Red-Stripe View Post
Mine won't go to 6th until your over 60-62. The transengineer poster comfirmed this was programmed in ( I already griped about it on another thread).

Winter time. My 20 went down to 16
Interesting. Must be a a difference in the trans for 1500 vs 2500. Most of my drive to work is in a 45 mph zone. I speed up to 48, let my foot off the gas and set cruise control to 47 and my truck is in 6th gear. Instant mpg at 47 mph in 6th is about 25 mpg.
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  #50  
Old 01-03-2014, 12:40 PM
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I have a 2012 Big Horn Crew Cab which I bought a few months ago with about 3500 miles on it. Just ran 20 gallons of pure gas through it driving around town. I got just under 14 mpg with non-aggressive driving so you are doing very well with 17 with aggressive driving. Much of my mileage was within the "econ" range. Maybe I should try aggressive driving!
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