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  #13  
Old 03-01-2015, 04:00 PM
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Re: Poorer Mileage now, What's the reason?

Quote:
Originally Posted by Morax View Post
Since I have gone through the Rev E update, I have seen a 1-2 MPG lower average...i have been looking at it closely for the last 1000km's I have done since the update
Due to the relative nature of representing fuel consumption in MPG, an MPG offset is not something that can be directly compared unless the actual MPG values are given (e.g. if you tell us it dropped from 29 to 27 MPG).

Conversely, can you give us the change you observed in L/100 km? That's directly comparable and not subject to the problems inherent to MPG.

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Old 03-01-2015, 04:41 PM
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Re: Poorer Mileage now, What's the reason?

It don't matter what I'm driving, diesel or gasser, my mpgs drop in the winter. Different fuel, and I tend to idle a bit longer before taking off.-Rockydee
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Old 03-01-2015, 05:02 PM
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Re: Poorer Mileage now, What's the reason?

Hi,
I am also seeing a significant drop in mpg. I have had all the recent updates + the new CAT installed after lots of def issues. It seems to have dropped directly after this work was completed not too long ago. Now cannot get over 21-22mpg. Granted, it is the winter and its been cold however last year at this time did not see such a drastic reduction. Im considering bringing it in for an evaluation- especially if I hear others with this same issue. Ive got about 15,250 miles total.
And, by the way.... for the very first time (have owned many new cars) I just purchased an 8 year max care extended warranty! Purchased on line. Love the car but reliability thus far is questionable. Consumer Reports just gave it an"unreliable, not recommended" evaluation. Hmmmm, dont doubt it.
I tow a travel trailer so this vehicle has been a good fit for me.

So, whats up with the mpg?
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Old 03-01-2015, 05:34 PM
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Originally Posted by mpgtow View Post
Now cannot get over 21-22mpg. [...]
I tow a travel trailer so this vehicle has been a good fit for me.
Just to be clear: are you dissatisfied because you are getting 21-22 mpg while towing in the winter?
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Old 03-01-2015, 05:43 PM
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Re: Poorer Mileage now, What's the reason?

Interesting fact came up about MPG suffering when using remote start... May be he reason...
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Old 03-01-2015, 05:44 PM
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Re: Poorer Mileage now, What's the reason?

Sorry about any confusion ....

No, Im not towing at this time.
I was getting 25mpg
Now its 20-21 maybe 22. No changes in driving habits or commute etc.
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Old 03-01-2015, 06:03 PM
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Re: Poorer Mileage now, What's the reason?

Remote Start: Can you point me to this information?
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Old 03-01-2015, 07:06 PM
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Re: Poorer Mileage now, What's the reason?

Quote:
Originally Posted by Roadkill View Post
Due to the relative nature of representing fuel consumption in MPG, an MPG offset is not something that can be directly compared unless the actual MPG values are given (e.g. if you tell us it dropped from 29 to 27 MPG).

Conversely, can you give us the change you observed in L/100 km? That's directly comparable and not subject to the problems inherent to MPG.
hey Roadkill, this is what I am seeing...before the update AVG 8.7L /100km sample made on 1000KM / after update AVG 9.9L /100km, sample done on 1000KM

Not major, but I would like to understand why I am seeing this...and after the REV E update...coincidence?
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Old 03-01-2015, 08:17 PM
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Re: Poorer Mileage now, What's the reason?

The newest updated also killed MPG. I live in a place that doesn't have winter blend. I dropped 5mpg with the newest flash. The reason being is that it doesn't use low end tq to hold hills anymore (to keep out of shudder area of trans). So the trans downshifts more often than it should.
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Old 03-01-2015, 11:36 PM
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Quote:
Originally Posted by Morax View Post
Not major, but I would like to understand why I am seeing this...and after the REV E update...coincidence?
Yeah, a 1.2 L/100 km diff is significant. I haven't encountered any changes personally, but my fuel economy has always been low.

I really doubt any flash could significantly affect mileage in 8th on the highway, though (unless it modified the regen program).

Pure speculation on my part, but if there's a loss in economy the obvious first suspect would be the flash causing the transmission to spend more time in lower gears. Second on the list would probably be changes to QD2/QT2 to spend more time transferring power to all 4 wheels instead of driving only the rear 2. But, like I said, pure speculation.

It's also really hard to take metrics in the winter. Spring through fall seem roughly comparable, but winter is like having a completely different vehicle. Air temps, changes in diesel blend, typically lower tire pressures, etc, all conspire to shoot fuel economy in the head.
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Old 03-08-2015, 11:17 AM
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Re: Poorer Mileage now, What's the reason?

Update:
Mileage has now increased.
Not sure if it's the warmer outside temperature, much less warm up time and/ or different fuel.
But now, almost back to previous around town daily mpg of 25.
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