3rd Gen Engine and Drivetrain -> 2007 and up 6.7 liter Engine and Drivetrain discussion only. PLEASE, NO HIGH PERFORMANCE DISCUSSION!

After the J35 flash, I got.....

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Old Jun 7, 2010 | 08:08 PM
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rraulston's Avatar
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After the J35 flash, I got.....

2 more MPG!!!!! verified at the pump. My over head display went from 14.4 to 17.0. Knowing it was off, I have been manually checking it. My manual checking with calculater was 13.1 to now 15.1. I think they are reducing the amount of fuel being dumped into the engine. My truck runs awsome...very pleased.
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Old Jun 7, 2010 | 09:19 PM
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my truck is running smoother, and the cruise isn't as jumpy as well. the mileage, i'll find out about in the next few days...
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Old Jun 8, 2010 | 05:52 AM
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Originally Posted by rraulston
2 more MPG!!!!! verified at the pump. My over head display went from 14.4 to 17.0. Knowing it was off, I have been manually checking it. My manual checking with calculater was 13.1 to now 15.1. I think they are reducing the amount of fuel being dumped into the engine. My truck runs awsome...very pleased.
I actually think my mpg, may be up alittle, maybe .5-1 mpg better, but I do believe my overhead is pretty accurite now. But still doing the delete
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Old Jun 8, 2010 | 02:31 PM
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I just finished a non-towing trip of 600 miles from LA to the Colorado river in AZ and back. I drove between 75 and 80 MPH there and like an old man around town. When I went to fill up before heading home my overhead was at 22 MPG!!! I know it lies, but was still happy because I know it is not too far off. Hand calculated, it was 20.1 MPG. Sweet! Only have 7700 miles and things are looking up still. I haven't calculated on the drive home so far, but the overhead was reading 19.7 so I expect about 2 less for a 17.7 or so which I'm very happy about since the drive home seems to be uphill and in a headwind compared to going. Also noticed that my bumper was a bit sooty now...
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