Go Back   EcoModder Forum > EcoModding > Hypermiling / EcoDriver's Ed
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 07-15-2017, 05:04 PM   #1 (permalink)
buckshot
 
Join Date: Mar 2017
Location: Florida
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Hypermiling with VW 6 spd Automatic

Greeting folks,
I have a couple of questions. Due to my selling my 2011 VW Jetta sportwagen TDI back to VW due to it having the TDI diesel engine I am again looking to purchase a car that will get similar fuel mileage. I have for a number of years been coasting all over the country due to my jetta having a 6 spd manual transmission. Several of the VW's I am looking at have the 6 spd automatic transmissions. My question is can I operate this VW automatic in the same manner I did with the manual ? ? ? Will I be able to go to neutral going down the hill and then drop back in to drive as my speed drops ? I'm trying to find a replacement with the manual but they are a bit scarce. I want to do what ever I can to try to keep getting my 50 to 54 mpg over the road. Thanks in advance for answering my questions.
Have fun,
buckshot. P.S. I am back to work on my Nissan diesel powered Sonoma.
Looking forward to getting 38 mpg with the Sonoma.

__________________
Wake up and smell the roses before you end up under them ! ! !

Road rage can be hazardous to your health........
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 07-15-2017, 07:53 PM   #2 (permalink)
EcoModding Apprentice
 
ar5boosted's Avatar
 
Join Date: Jun 2017
Location: Sydney
Posts: 110
Thanks: 8
Thanked 21 Times in 16 Posts
If you shift your Auto manually then sure.

I have an Auto Torque Convertor. I've seen where others have modified the controllers to suite hypermiling by adding a sort of manual override.

However, with VW, they're already pretty good. I'm sure you'll find that yours cuts off fuel to the Injectors when it coasts.

That's not as good as going into N and turning off and automatically turning back on when you want to go back up the other side.

Being a computer-programmer, I was looking into solving this with GPS code. But haven't found enough 'friends' to make it worthwhile.
__________________
2003 Renault Scenic - 30% more power with no loss in fuel economy.
1991 Toyota GT4 - more economical before ST215W engine-swap.
previous: Water-Injected Mitsubishi ~33% improved.
future - probably a Prius
  Reply With Quote
Old 07-15-2017, 08:08 PM   #3 (permalink)
It's all about Diesel
 
cRiPpLe_rOoStEr's Avatar
 
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 12,548
Thanks: 0
Thanked 1,622 Times in 1,447 Posts
Quote:
Originally Posted by ibbuckshot View Post
I am back to work on my Nissan diesel powered Sonoma.
Looking forward to getting 38 mpg with the Sonoma.
That sounds interesting. But anyway, would a new Cruze be totally out of question? IIRC it's the only new Diesel car available with a manual transmission there.
  Reply With Quote
Old 07-16-2017, 09:27 AM   #4 (permalink)
Focused on MPG
 
Join Date: Apr 2009
Location: Uphill from the river!
Posts: 429

Marinator - '06 Mercury Mariner Premier
90 day: 10.61 mpg (US)

SILVER BULLET - '19 DODGE GRAND CARAVAN GT
90 day: 18.08 mpg (US)

Myrtle - Wife's JKU - '12 Jeep JK Unlimited Sport
90 day: 15.51 mpg (US)
Thanks: 122
Thanked 126 Times in 100 Posts
If you try the automatic, shift to neutral at speed with engine on and see if rpms drop to idle or close, if they don't drop, you won't achieve good numbers that you are hoping for.

My Focus drops to idle, but my wife's Mariner doesn't, it holds the rpms.
__________________







Staying Focus'd on MPG
  Reply With Quote
Old 07-16-2017, 02:35 PM   #5 (permalink)
Volvo-driving MachYeen
 
Fingie's Avatar
 
Join Date: Jan 2015
Location: Finland
Posts: 788

Neo Volvo - '98 Volvo S70 10V
90 day: 24.98 mpg (US)
Thanks: 298
Thanked 82 Times in 68 Posts
weedubs dislike coastin'
__________________
If you don't make any mistakes in your life,
life itself will be a f*ckup.



With Volvo to Valhalla and back!
  Reply With Quote
Old 07-17-2017, 11:41 PM   #6 (permalink)
Master EcoModder
 
mwebb's Avatar
 
Join Date: Jul 2009
Location: New York
Posts: 513

no nickname , it's just a car - '04 volkswagen golf tdi
Thanks: 2
Thanked 101 Times in 74 Posts
probably not a good idea with the 09g

some of the newer VW DSG transaxles are designed to
"freewheel" or coast
downhill
more in the systems designed for fuel economy

the 09g 6 speed automatic is not

and
the DSG is really a computer controlled (and shifted) manual transmission
no torque converter or LOSSES from a torque converter
so IF you are going or thinking to stick with VW ( a choice which i agree with)
try to find a manual trans or DSG and avoid the automatic altogether

i find i can hold most of the 1.8s or the 1.4 near 50mpg while at cruise around 55 to 60mph with DSG or manual trans as per the mfi display

an UNmentioned choice C is purchase and older TDi with the BEW or BRM pd engine i would never consider a diesel cruze they are junk in my very biased but knowledgeable opinion

having said this
be aware that i am a certified VW tech and have been for many moons

i drive a TDi golf with BEW pd engine , manual trans AND a V6 ATQ passat auto trans

Last edited by mwebb; 07-17-2017 at 11:48 PM.. Reason: mfi
  Reply With Quote
Old 07-20-2017, 12:36 PM   #7 (permalink)
It's all about Diesel
 
cRiPpLe_rOoStEr's Avatar
 
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 12,548
Thanks: 0
Thanked 1,622 Times in 1,447 Posts
Quote:
Originally Posted by mwebb View Post
some of the newer VW DSG transaxles are designed to
"freewheel" or coast
downhill
more in the systems designed for fuel economy
What do you mean by freewheel? Neutral-coasting?


Quote:
the DSG is really a computer controlled (and shifted) manual transmission
no torque converter or LOSSES from a torque converter
so IF you are going or thinking to stick with VW ( a choice which i agree with)
try to find a manual trans or DSG and avoid the automatic altogether
I honestly don't know how any of those dual-clutch automated-manual transmission fares on hypermiling, but I have seen some complaints about a low reliability of the DSG under certain harsher conditions.
  Reply With Quote
Old 07-20-2017, 11:59 PM   #8 (permalink)
Master EcoModder
 
mwebb's Avatar
 
Join Date: Jul 2009
Location: New York
Posts: 513

no nickname , it's just a car - '04 volkswagen golf tdi
Thanks: 2
Thanked 101 Times in 74 Posts
Quote:
Originally Posted by cRiPpLe_rOoStEr View Post
What do you mean by freewheel? Neutral-coasting?

yes , system goes to nuetral rolling downhill as allowed by the engineering involved and dependent on conditions at the time


I honestly don't know how any of those dual-clutch automated-manual transmission fares on hypermiling, but I have seen some complaints about a low reliability of the DSG under certain harsher conditions.
early DSG systems had issues with dual mass flywheels .... mostly resolved .... and we did quite a few mechatronix units under recall
warranty ALSO that issue has been resolved
so
to me it seems (since i am hybrid certified)
the VW jetta hybrids have more DSG issues than regular non hybrid VWs HOWEVER most of those are displayed and resolved at low mileage under warranty and the rest of the VW line up does not have DSG failure issues
of any kind
when
not
abused ... even when they are abused failure rates are very low ... we have not done any yet this year to date .

  Reply With Quote
Old 07-22-2017, 01:29 PM   #9 (permalink)
one of thOOOse people
 
Join Date: Mar 2009
Location: the cloud(s)
Posts: 293

twitchy - '98 honda civic dx + sir + ls
90 day: 30.2 mpg (US)

Norman - '14 Ford E-350 EXT
90 day: 16.18 mpg (US)

Silver - '12 VW Golf Base
90 day: 26.1 mpg (US)

Sparta - '19 Honda CB300R
90 day: 84.07 mpg (US)
Thanks: 0
Thanked 81 Times in 66 Posts
My wife has a DSG 6sd golf. Around town it does fairly well at dropping to idle and coasting off throttle. On the highway I find it better to manually shift to 6th and leave it there because in auto it down shifts to 5th with too little pressure on the accelerator. With that said the best I've managed is about 34 mpg on longer trips. My wife gets about 24 in town.
The computer does try to shut off the injectors when coasting but that causes a noticeable deceleration. Shifting to neutral is NOT recommended because of cooling and lubrication issues. Stick to true manuals if you want to neutral coast.
FYI my biggest complaint with the VW DSG, is the shifter is setup backwards. ie, bump the lever forward to increase gear, and back to decrease.
  Reply With Quote
The Following User Says Thank You to hamsterpower For This Useful Post:
Fingie (07-23-2017)
Old 07-25-2017, 09:05 AM   #10 (permalink)
Master Novice
 
elhigh's Avatar
 
Join Date: Jan 2008
Location: SE USA - East Tennessee
Posts: 2,314

Josie - '87 Toyota Pickup
90 day: 40.02 mpg (US)

Felicia - '09 Toyota Prius Base
90 day: 49.01 mpg (US)
Thanks: 427
Thanked 616 Times in 450 Posts
The VW is unsafe to coast in neutral with the engine ON? Why not? I see you say cooling and lube issues but the engine is still turning, the pumps are still running. Do they not keep up with cruising speed loads when the engine is at low revs?

__________________




Lead or follow. Either is fine.
  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com