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TDI Fuel Economy Discussions about increasing the fuel economy of your TDI engine. Non TDI related postings will be moved or removed.

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Old May 9th, 2014, 21:38   #1
Scoutx
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Default MK6 Quest for 900+ mile tank

Ok, time to start documenting this so folks can follow along.

Filled up the other day, and did some donuts and slaloms to slosh fuel in tank and work air to filler. Topped off and repeated until I could get no more air out. Addition of about 1.2 gallons to already full tank resulting in 'superfull' tank.

(note: I will try to add the pictures later today)

Please excuse the picture quality, some of these are not the best.

Near end of run this afternoon I was:

122.0 miles on the clock
Computer showed 810 miles left in tank



At the end of the run I was 127.x on the clock
Computer showed 820 miles left in the tank
(no clear picture - took one but it smeared and I didn't notice until I looked just now)

Analysis: I am about 47 miles above that necessary for 900 mile tank. I don't think fuel level is down to sending unit yet. See 'superfull above'.
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Last edited by Scoutx; May 11th, 2014 at 21:03.
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Old May 9th, 2014, 21:40   #2
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Evening trip.

195.4 on the clock
Computer shows 785 to go.



Analysis: I should be about 75-80 miles over that needed for 900 mile tank

I'm not sure if I'm down to the sending unit yet, but should be so above may be 'accurate' as far as the computer is concerned, but based on past experience, you drop quicker towards the end of a tank so subtract 20-30 miles for end of tank drop off.

Now if I can just hold it together for a bit over 700 miles more..... wish me luck.
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Last edited by Scoutx; May 11th, 2014 at 21:05.
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Old May 10th, 2014, 04:42   #3
SirSipsAbit
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Quote:
Originally Posted by Scoutx View Post
Evening trip.

195.4 on the clock
Computer shows 785 to go.

<insert picture #2 here>

Analysis: I should be about 75-80 miles over that needed for 900 mile tank

I'm not sure if I'm down to the sending unit yet, but should be so above may be 'accurate' as far as the computer is concerned, but based on past experience, you drop quicker towards the end of a tank so subtract 20-30 miles for end of tank drop off.

Now if I can just hold it together for a bit over 700 miles more..... wish me luck.
I concur a loss of 20 or so miles at the end. I did make it 103 miles with the low fuel light on.

Good luck
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Old May 11th, 2014, 01:06   #4
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Good luck!
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Old May 11th, 2014, 03:20   #5
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Honestly, I'll be impressed if you crack 800 at that elevation.
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Old May 11th, 2014, 19:46   #6
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I've already done 800 mile tanks....twice.....once to show it could be done in a Mk6 and later when I was running late but still had the range..but proves it can be repeated.

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Last edited by Scoutx; May 11th, 2014 at 21:47.
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Old May 11th, 2014, 19:50   #7
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Update: Had to pick up my in-law today.

Trip there, I topped out at 1010 (note did have 1015 indicated for awhile, and one brief spike to 1020) mile range combined between actual and remaining range provided by the computer.




Trip back however, didn't allow me to maintain much hypermiling so I lost a good part of my cushion, but 900 is still probable so continuing the run.

Note: Lost two blips on fuel gauge, one just before end of trip so should have about 3/4 of tank left

357.7 on the clock
600 remaining range indicated.



PS having a pain trying to get Verizon's online album to work so I can transfer pictures from my phone, but still working on it. Plan to call customer support tomorrow to get the issue resolved. Last time I get a phone that doesn't allow direct download to my PC via USB or memory card.
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Last edited by Scoutx; May 11th, 2014 at 21:21.
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Old May 12th, 2014, 18:56   #8
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Sign up for Dropbox. A basic cloud service that's free and enables picture uploads between multiple devices.

In any case, I'm excited to see if you can get to 900!
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Old May 12th, 2014, 19:07   #9
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I subscribed to this thread and been trying to get the best mileage I can with this car, 2013 jetta tdi

So far...110kph,19deg C cruise on




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Old May 12th, 2014, 22:03   #10
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Yes! Yes! Yes!

Perfect run...regained much of my cushion & established a personal best for MPG.






Take that you Mk4 guys with your 60mpg and bathtub sized fuel tanks...


Anyway, end of morning run.

420.9 miles on the clock
675 range indicated.

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Old May 12th, 2014, 22:06   #11
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Evening Run.

479.6 on the clock
Range at 520 miles



Note: Dropped to 5/8ths at 475 miles.
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Old May 12th, 2014, 22:14   #12
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Let me take a moment here to comment...that doing this sort of hypermiling is a PITA and it might all come to naught if conditions fall apart. T'storms today and tomorrow...Rain on Fri.... Rain may well spell the end of this, or at the very least kill any slight chance that may exist for a 1,000 mile tank, assuming the computer is at all accurate.

Pray for me.
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Old May 12th, 2014, 22:23   #13
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Quote:
Originally Posted by JASONP View Post
I subscribed to this thread and been trying to get the best mileage I can with this car, 2013 jetta tdi

So far...110kph,19deg C cruise on
You've got a chance to run an 800 mile tank there. A lot depends if you can improve a bit on your economy over the next 1000km. Otherwise you may come up short and/or have to drive really deep into the tank beyond zero miles remaining.
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Old May 12th, 2014, 23:06   #14
JASONP
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Default MK6 Quest for 900+ mile tank

Just out of curiosity how many miles are on your jetta?
I'm currently at 33,000 kms or 20,500 miles , I'm afraid to push it past the fuel up now light .
I used to have a 2010 GSW (3271lbs) and acheived this once, I suspect the jetta (3210 lbs) will yield about the same or better mileage in another 30-40 k

That's 72.1mpg below




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Old May 13th, 2014, 01:22   #15
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i only just cracked a 600 mile tank on my 2.0tdi golf! (I should add that was with 52l of diesel until the light first flashed on)

currently at 114,000 miles and doing a lot of motorway mileage, what kind of speeds are you doing to get that 900 tank? i'd be more than happy to get 650/700!

the 600 tank was probably 480/500 motorway miles sitting at 70-75mph with maybe a bit faster at moments.
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