smkettner
Posts: 7373
Joined: Mon Aug 09, 2010 10:13 pm
Delivery Date: 26 Feb 2014
Location: Orange County, CA

Re: Most Efficient Freeway Speed...Is There One?

Tue May 21, 2019 7:55 pm

powersurge wrote:OMG now we are debating drag coefficients!!

The original question was is there a best speed for efficiency.... I say..... Keep it between 50 and 60...
50/60 is probably the slowest realistic speed however I think a little slower would go further.
1 bar lost at 21,451 miles, 16 months.
2 bar lost at 35,339 miles, 25 months.
LEAF traded at 45,400 miles for a RAV4-EV
RAV4 traded in for I-Pace Dec 2018

palmermd
Posts: 2587
Joined: Fri Apr 23, 2010 3:19 pm
Delivery Date: 31 Mar 2011
Leaf Number: 1100011011
Location: Hermosa Beach, CA

Re: Most Efficient Freeway Speed...Is There One?

Tue May 21, 2019 9:45 pm

Physics does not change much between a Tesla and a Leaf. Here is the graph for Model S. Peak appears to be around 22mph. So basically the answer is "as slow as you feel comfortable driving".

Image

https://www.tesla.com/blog/model-s-efficiency-and-range
Michael

Leaf from 31 March 2011 - Traded 18 April 2018 for Tesla Model 3 Unicorn
Driving electric since 1996


Leaf Bar Loss

cwerdna
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Joined: Fri Jun 03, 2011 4:31 pm
Delivery Date: 28 Jul 2013
Location: SF Bay Area, CA

Re: Most Efficient Freeway Speed...Is There One?

Wed May 22, 2019 12:47 am

^^^
Yep. And https://web.archive.org/web/20100721110 ... -and-range is the Roadster blog entry w/o broken images.

'19 Bolt Premier
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Please don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

garsh
Posts: 1173
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Location: Pittsburgh PA

Re: Most Efficient Freeway Speed...Is There One?

Wed May 22, 2019 3:26 am

LeftieBiker wrote:The most efficient speed is something like 17MPH.
Actually, 12mph. Reference: http://www.mynissanleaf.com/viewtopic.php?p=101293

I used that fact once to continue for over a mile after hitting turtle. :o I made it to the charger. 8-)

The drivetrain isn't as efficient as a Tesla Model 3, but Nissan has done an excellent job of reducing steady-state consumption, which is why its most efficient speed is so much lower than a Tesla.
2012 Black SV, bought 2012-04-04, sold 2019-05-10. 7 bars, 101,850 miles.
Current rides: 2018 Tesla Model 3 Performance, 2018 Chevrolet Volt LT

DougWantsALeaf
Posts: 903
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Delivery Date: 18 May 2013
Leaf Number: 407811
Location: Chicago North Side

Re: Most Efficient Freeway Speed...Is There One?

Wed May 22, 2019 4:19 am

Any feel for where Nissan is lagging in drive train consumption?
2019 SV Plus Silver
2013 Leaf SV
100 Mile Club Member (Number 87)
Max distance on 13 Leaf: 120 miles
Max distance on 19 Leaf: 242 Highway 4.5 miles/kWh (4.9 KWh remaining)

Dala
Posts: 96
Joined: Sun Oct 28, 2018 11:24 am
Delivery Date: 01 Jan 2015
Leaf Number: 316851

Re: Most Efficient Freeway Speed...Is There One?

Wed May 22, 2019 5:15 am

DougWantsALeaf wrote:Any feel for where Nissan is lagging in drive train consumption?
You can replace the drive unit oil (yeah, this car has OIL :D) with a more freeflowing one. This will increase efficiency further.

The stock oil is specced so that it can handle all different operating temperatures, but you can modify this with a high performance oil that is suitable for your climate.

Adds maybe 0.1->0.2 m/kWh efficiency

powersurge
Posts: 1458
Joined: Wed Oct 21, 2015 10:24 am
Delivery Date: 06 Dec 2014
Location: Long Island, NY

Re: Most Efficient Freeway Speed...Is There One?

Wed May 22, 2019 6:25 am

Dala wrote:
DougWantsALeaf wrote:Any feel for where Nissan is lagging in drive train consumption?
You can replace the drive unit oil (yeah, this car has OIL :D) with a more freeflowing one. This will increase efficiency further.

The stock oil is specced so that it can handle all different operating temperatures, but you can modify this with a high performance oil that is suitable for your climate.

Adds maybe 0.1->0.2 m/kWh efficiency
The transmission does not have "OIL". It Takes Red Transmission fluid...

SageBrush
Posts: 4724
Joined: Sun Mar 06, 2011 2:28 am
Delivery Date: 13 Feb 2017
Location: NM

Re: Most Efficient Freeway Speed...Is There One?

Wed May 22, 2019 6:58 am

powersurge wrote:
Dala wrote: The transmission does not have "OIL". It Takes Red Transmission fluid...
Which is made from ... ?
2013 LEAF 'S' Model with QC & rear-view camera
Bought off-lease Jan 2017 from N. California
Two years in Colorado, now in NM
03/2018: 58 Ahr, 28k miles
11/2018: 56.16 Ahr, 30k miles
-----
2018 Tesla Model 3 LR, Delivered 6/2018

lorenfb
Posts: 2241
Joined: Tue Dec 17, 2013 10:53 pm
Delivery Date: 22 Nov 2013
Leaf Number: 416635
Location: SoCal

Re: Most Efficient Freeway Speed...Is There One?

Wed May 22, 2019 7:47 am

SageBrush wrote:
powersurge wrote:
Dala wrote: The transmission does not have "OIL". It Takes Red Transmission fluid...
Which is made from ... ?
And what's in Tesla's gear boxes for lubrication?
This would seem similar to the dual-motor Model S, which has a ~9.73:1 rear reduction ratio (at least for the "large drive units), and a slightly "taller" gearing for the front motor (~9.34:1). This allows the car to cruise primarily with the front motor operating at a lower RPM range closer to it's efficiency sweet spot.
https://teslamotorsclub.com/tmc/threads ... os.103576/

And what's that black round thing on the M3 transfer case like I see attached to my three ICEVs' ICEs?

https://www.youtube.com/watch?v=ANLPPKRwiyQ
#1 Leaf SL MY 9/13: 74K miles, 48 Ahrs, 5.2 miles/kWh (average), Hx=70, SOH=78, L2 - 100% > 1000, temp < 95F, (DOD) > 20 Ahrs
#2 Leaf SL MY 12/18: 4.5K miles, 115 Ahrs, 5.5 miles/kWh (average), Hx=98, SOH=99, DOD > 20%, temp < 105F

SageBrush
Posts: 4724
Joined: Sun Mar 06, 2011 2:28 am
Delivery Date: 13 Feb 2017
Location: NM

Re: Most Efficient Freeway Speed...Is There One?

Wed May 22, 2019 10:16 am

lorenfb wrote: And what's in Tesla's gear boxes for lubrication?
If you are looking for petroleum products in a Tesla it is easier to start with the tyres.
2013 LEAF 'S' Model with QC & rear-view camera
Bought off-lease Jan 2017 from N. California
Two years in Colorado, now in NM
03/2018: 58 Ahr, 28k miles
11/2018: 56.16 Ahr, 30k miles
-----
2018 Tesla Model 3 LR, Delivered 6/2018

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