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Old 05-26-2013, 10:08 PM   #51
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Mileage divided by gallons I know the DIC isn't right never has been
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Old 05-26-2013, 10:10 PM   #52
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My DIC says 13.6 mpg since new I've never reset it also my OnStar app says the same thing but that's loaded and unloaded combined since new about 60% of my mileage is pulling a trailer or load
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Old 05-26-2013, 10:25 PM   #53
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Originally Posted by jevanb View Post
you are prob looking at the DIC which is always wrong, everyone I know gets worse milage, I also have a 6 speed and I see 1600RPM at that speed and we also have the same final gear set, but at that speed I am at 5th not 6th, the only diff is your tires size
Wrong. In 6th. 18" wheels. Not looking at the dic. Why the arguments? Oh well.
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Old 05-26-2013, 10:52 PM   #54
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Wrong. In 6th. 18" wheels. Not looking at the dic. Why the arguments? Oj well.
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Old 05-27-2013, 08:47 AM   #55
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Fuel mileage discussions always end the same. Vast varying reports some un-explainable low MPG numbers and some that are so high you question the accuracy or truthfulness. Typical is probably somewhere in between. Also keep in mind driving habits, average speed ect. Lots of things are going to make these MPG reports vary a lot.
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Old 05-27-2013, 09:05 AM   #56
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On my 2011 GMC I get 11-12 towing a 12,000 pound trailer and 20-22 on the highway not towing. I manually calculated it and viewed the DIC, pretty much the same. Towing with my previous gasser got 8-9 towing a 8,000 pound trailer 50% improvement in mpg with the diesel towing 4,000 pounds more!
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Old 05-27-2013, 09:42 AM   #57
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On my 2011 GMC I get 11-12 towing a 12,000 pound trailer and 20-22 on the highway not towing. I manually calculated it and viewed the DIC, pretty much the same. Towing with my previous gasser got 8-9 towing a 8,000 pound trailer 50% improvement in mpg with the diesel towing 4,000 pounds more!
X2 manually checked against dic and found mine to be very close .
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Old 05-27-2013, 11:27 PM   #58
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Mine is usually with in 0.1 or 0.3 from dic to manual calculation.

*This is why peoples # don't always match-

You would be surprised to know how many vehicles have the wrong tire size calibration downloaded. And sometimes the door sticker size doesn't match the calibration. This is easily adjusted at a dealer or at a shop that has a scanner that will do it.
Ps. I change tire sizes frequently so I calculate my % diferences in tire sizes when running my larger tires
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