Best TDI tank thus far - 32.3 MPG (actual) and 609 miles - AudiWorld Forums



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Best TDI tank thus far - 32.3 MPG (actual) and 609 miles

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Old 07-02-2014, 10:08 AM   #1
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Default Best TDI tank thus far - 32.3 MPG (actual) and 609 miles

Road trip NC -> NJ, with some around town driving before I left, and spanning 3 days.

Still had 15 miles remaining on the trip computer, and another 20 miles or so past that, so could have gotten close to 650 if I really tried to push it. Confirmed also by "only" filling with 18.8 gallons.

Highway cruising speed around 78mph when possible.





15k miles on TDI now.





Zoomed in for just the Q5 TDI. Prior best was 31.7mpg:



I'm now running the VAGCOM fuel consumption accuracy at "107" to see how that does. 106 was clearly still too optimistic, but we'll see how 107 vs 108 compares after a few more tanks.




609 miles is new best. Previously it was 604:




"only" 18.8 gallons to fill up for these 609 miles:




Still driving the TDI a lot (and thinking about selling the 996TT):





All Graphs here:
http://ctny.audiworld.com/mark/996tt/mileage/

Last edited by Mark P; 07-04-2014 at 12:33 PM.
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Old 07-02-2014, 11:48 AM   #2
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For some reason I thought your A3 was a TDI, but it must have been a 2.0T based on your chart above.

I need to get out and drive more. You got your Q5 TDI only shortly before I did and I only hit 5K over the weekend.
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Old 07-02-2014, 12:28 PM   #3
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Correct 2.0T FWD DSG. Likewise before purchase when I compared fuel economy/costs I was doing so between 93oct A3 to Diesel Q5:





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Old 07-06-2014, 06:08 AM   #4
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I just did a little over 500 miles on 3/4 of a tank of Gas with the 2.0 TFSI
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Old 07-06-2014, 07:18 AM   #5
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Quote:
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I just did a little over 500 miles on 3/4 of a tank of Gas with the 2.0 TFSI
WOW This is an excellent result for 2.0TFSI
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Old 07-06-2014, 08:36 PM   #6
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Mark ,
How are you generating all these graphs ? Is it from data you've collected from fuelling up on trips or is it from something generated automatically by connecting to your car?

Sorry if the answer is so obvious
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Old 07-07-2014, 07:00 AM   #7
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Mark ,
How are you generating all these graphs ? Is it from data you've collected from fuelling up on trips or is it from something generated automatically by connecting to your car?

Sorry if the answer is so obvious
Excel. I have created and expanded on a template over the years. I merely write down odometer mileage and MPG on my receipt and enter it in later to my spreadsheet. The spreadsheet is set up to automatically do various calculations on that, combine it with other car data, and update graphs. It then exports the graphs to images upon saving the spreadsheet.

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Old 07-07-2014, 07:04 AM   #8
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I just did a little over 500 miles on 3/4 of a tank of Gas with the 2.0 TFSI
Why didn't you enter that one in Fuelly? The most I see in your fuelly log is:
<table id="fuelup_list" class="datatable dataTable" data-rows="23" data-post="fuelup-log" data-postdata="{&quot;name&quot;:&quot;usercar_id&quot; , &quot;value&quot;:&quot;245875&quot;}" data-popup="Tips: Enter a word or two to filter by your notes, or use one of the following keywords to filter by a data point:
  • [M]iles
  • [G]allons
  • [P]rice
  • [MPG]
Examples:
  • p < 3.10 (price is less than $3.10)
  • g < 10 (fuel-up under 10 gallons)
  • mpg > 28 (better than 28 MPG)
  • m > 360 (trip over 360 miles)
"><tbody role="alert"><tr class="even"><td class="">3/22/14</td><td class="">430.40miles</td><td class="">17.59gal</td><td class="">24.46mpg</td></tr></tbody></table>
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Old 07-07-2014, 09:01 AM   #9
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Ah. That explains it. I used to use excel when cars didn't have MPG Figures on the dash at hand. It's too much hard work when it's already on screen for you. To be honest with a diesel you tend to just fill up and check what your average from the last fill up
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Old 07-07-2014, 09:27 AM   #10
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Originally Posted by sbarlas View Post
Ah. That explains it. I used to use excel when cars didn't have MPG Figures on the dash at hand. It's too much hard work when it's already on screen for you. To be honest with a diesel you tend to just fill up and check what your average from the last fill up
Looking at the computer won't tell you your actual consumption, though, as many times they're off (though my Passat was fairly accurate from what I recall). But at least with the Q5 it seems like it's a reasonably-constant difference (~7% for me) so you can still compare relative values (an indicated 35mpg may not be actually 35mpg, but you'll know you did decently better than your indicated 30mpg tank). With my Odyssey it was wildly off every tank (almost random what the computer would indicate and it would be large swings from way optimistic to way pessimistic, and that was with using the same station almost all the time), so to have any idea how I was doing I had to keep my own records.

I keep my own records, as well, and basically have historical data in a database so I can crunch numbers and generate charts and such. Fuelly's a quick way to get the same sort of thing going, though, for those less-inclined to keep records themselves (just use the mobile site or app and log the data when you fill up and it'll get you some basic charts without any additional effort on your part). Nice to be able to add notes in so you can keep an eye on trends (are you getting better/worse mileage lately?).
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