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Old 01-19-2019, 02:34 AM   #1 (permalink)
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Googled hypermiling...found myself here ('17 Jetta 1.4T auto)

I've been trying to eek out as many MPGs as possible lately and I'd heard the term hypermiling so I typed it in Google and, well, here I am. I have a 2017 Jetta with the 1.4t and an automatic trans. I'm looking forward to learning the best ways to reduce fuel consumption. Does anyone know the most efficient engine RPM when cruising in 6th gear....or any particular gear for that matter? Thanks!


Last edited by MetroMPG; 03-05-2019 at 01:50 PM.. Reason: (added info to title)
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Old 01-19-2019, 05:00 AM   #2 (permalink)
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Depends on the engine and transmission.

With the VW diesels, you sometimes do a little better if the engine is in the boost rather than just off-idle, but I'm not quite sure if that extends to their gasoline turbos.

Experimentation is definitely in order.
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Old 01-19-2019, 08:23 AM   #3 (permalink)
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As far ad I know, lowest RPM with turbo fully active. With diesels its around 2200 rpm, but you need to find yourself. Try to search for kW vs RPM charts, o;-)r torque vs RPM. You can usually tell where the boost is active.
And get either OBD2 adaptor and Torque app, or ScanGauge or UltraGauge or similar device. Ot will tell you more.

Oh, I almost forgot: Welcome to the forum!
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Old 01-19-2019, 08:25 AM   #4 (permalink)
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Thanks, Niky. I included the engine & transmission info but I guess I should have been more specific in saying I wanted an answer that applied specifically to my car. I've been experimenting but I asked because I thought there might be a chance someone would be able to share some definitive info. Also, the Jetta does not include a gauge or any other mechanism to inform you that it is using boost.
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Old 01-19-2019, 08:38 AM   #5 (permalink)
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It’s not stunt driving, it’s
Records.

Cut the annual miles is
First

Drive the remaining fewer miles (having accomplished same ends) at a higher level of
Skill

Which is pretty much Never Stop & Never Idle

The key to it all is
Discipline

Tally annual miles & all fuel purchased. Plan all trips. No cold starts. Combined errands. Best routing.

Against Average Miles per
HOUR

Raise that number by 20% and you’ll see
Savings

.
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Last edited by slowmover; 01-19-2019 at 08:44 AM..
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Old 01-19-2019, 12:39 PM   #6 (permalink)
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Quote:
Originally Posted by seifrob View Post
As far ad I know, lowest RPM with turbo fully active. With diesels its around 2200 rpm, but you need to find yourself. Try to search for kW vs RPM charts, o;-)r torque vs RPM. You can usually tell where the boost is active.
And get either OBD2 adaptor and Torque app, or ScanGauge or UltraGauge or similar device. Ot will tell you more.

Oh, I almost forgot: Welcome to the forum!


Thank you!

I had thought that being under boost decreases efficiency. Thanks for that info. I'll have to search for some charts.
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Old 01-19-2019, 12:41 PM   #7 (permalink)
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Quote:
Originally Posted by slowmover View Post
Its not stunt driving, its
Records.

Cut the annual miles is
First

Drive the remaining fewer miles (having accomplished same ends) at a higher level of
Skill

Which is pretty much Never Stop & Never Idle

The key to it all is
Discipline

Tally annual miles & all fuel purchased. Plan all trips. No cold starts. Combined errands. Best routing.

Against Average Miles per
HOUR

Raise that number by 20% and youll see
Savings

.


Yup, all common sense stuff.

Do you know where I can look to find info for the most efficient engine RPM when cruising in 6th gear of my particular car?
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Old 01-19-2019, 01:07 PM   #8 (permalink)
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The rewiew I was able to find says 100 km/ h, 2500 rpm, 5.7 l/100 km. But it is 6 speed manual. All (around 400?) jettas in my country are probably manual.

Buy bluetooth OBD2 dongle. Its about $6. Put it in your OBD port, pair itwith your smartphone. Download Torque pro app ($4). Enjoy instant MPG and more. Find what suits you best.

Btw the rewiew says peak torque from 1500 to 4000 rpm, so keep in this band.

Last edited by seifrob; 01-19-2019 at 02:22 PM.. Reason: numbers fixed
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Old 01-19-2019, 06:09 PM   #9 (permalink)
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Quote:
Originally Posted by BSEM View Post
Thank you!

I had thought that being under boost decreases efficiency. Thanks for that info. I'll have to search for some charts.
In a gasoline powered engine.
Diesel engines want more air.
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Old 01-19-2019, 06:51 PM   #10 (permalink)
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Quote:
Originally Posted by oil pan 4 View Post
In a gasoline powered engine.
Diesel engines want more air.

Thanks for clarifying. So, to be sure..
Gas engine under boost = bad (inefficient)
Diesel engine under boost = good (efficient)

?

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