Tesla Model ≡ Thread - Page 92

Josh (PA) · 10-25-2018, 09:17 PM

This is one of the many things keeps me from considering a Tesla. I have a 22 mile commute to work on the PA Turnpike, where I average 80 mph. I have no interest in driving 15 mph slower just to save battery life in case I need to run a few errands before I get home.

FYI, here is a plot of speed vs battery drain and range vs speed at various temps from the Model S:

these were enlightening to me with the speed I usually commute at.

ZBB · 10-25-2018, 09:38 PM

You have a 22 mile commute and you are worried about range for a car with an EPA Rating of 310 miles?

Plug in every night! Leave home at 90%. Even driving at 80 will result in you using well under 100 rated.

And keep in mind that you also have the same impact on range from air resistance in an ICE. Do you keep extra gas at home just in case?

rumatt · 10-25-2018, 10:41 PM

Quote:

Originally Posted by ZBB

What is the speed limit?

55.

But if you drive under 70 you're the slowest person on the road.

Quote:

Keep in mind that the air resistance impact on mileage is not linear — and once you are over 49, you really feel the impact.

Yes but as you pointed out to Josh, this is how I drive in my ICE car. And I've never complained about needing to carry extra fuel tanks in my trunk. I drive the same in the E46 with it's 18 year old engine technology, and I'm getting 26 MPG. I'm not modifying my driving habits to accommodate my electric vehicle's limitations.

Quote:

Try driving 5 over the limit one day to see what you get...

As an experiment, maybe. But I don't see how that experiment helps me in any way. See comment above about refusing to modify my driving habits....

Quote:

Originally Posted by Josh (PA)

This is one of the many things keeps me from considering a Tesla. I have a 22 mile commute to work on the PA Turnpike, where I average 80 mph. I have no interest in driving 15 mph slower just to save battery life in case I need to run a few errands before I get home

I'm with ZBB on this one. If all you want to do in the car is commute this is a silly concern. Hell you could probably drive there and back using ludicrous mode and you'd be fine. The only problem comes if you want to then go somewhere else after work, yada yada.

Don't get me wrong - I'm complaining about the range but I love the car. It's not going anywhere. I have no desire to drive any of my other vehicles at this point.

rumatt · 10-26-2018, 01:30 PM

I drove as gently as I could on the drive to work this morning. I accelerated gently at all times and for the highway portion I set the cruise at 62 mph (7 over the speed limit. I was literally the slowest car on the road - I passed 0 cars and was passed by about 1,000.

I averaged 304 w/mile = 256 miles for the whole battery, 179 for 70% of battery (85 to 15)

I'm going to read up on TMC about whether it's mostly the tires or wheels... But I'm thinking of buying the 18" TST wheels and putting on Conti DSW 06 all seasons for winter, and see how that impacts things.

https://tsportline.com/products/18-t...=3900044640285

equ · 10-26-2018, 02:10 PM

What about tire pressure? Is the factory using a higher load PSI to compute range and you're driving on more comfortable and likely better handling partial load PSI's?

Do electric drivelines need to break in? I'd be surprised if they did. Or perhaps there are some error bars on the factory estimate and you're a little on the wrong side, probably no big deal.

ZBB · 10-26-2018, 08:33 PM

Are you tracking your rated miles used vs actual miles?

Of course a higher Wh/mile means you will use rated miles up faster. But you are trying to figure out your realistic range so you can feel comfortable with doing side trips on top of your commute.

In my case, my commute is typically about 49 miles, but can be 58 if I have to take the longer route both ways. In both the 3 and the S, I would get pretty close to rated range while driving, and lose a few miles to the vampire when parked. I’d use 55-65 rated miles, with an extra 10 on the coldest winter days,

A 90% charge on the S was 167 miles for most o the last year. I’d get home after work anywhere between 105 and 120 miles remaining (the lower end only on the coldest days). So I had plenty of range to do other things if needed,

In the 3, a 90% charge is 279 miles. I wasn’t charging every night, but even after 2 days of commuting I still had over 170 miles avail. That’s plenty of range to go do another drive...

JST · 10-26-2018, 10:46 PM

https://electrek.co/2018/10/26/tesla...ation-holders/

Hm, this is kind of annoying. OTOH, I guess if id waited I might not have gotten the full tax credit, and probably would have gotten less for the Model S trade.

equ · 10-26-2018, 11:25 PM

I don't know if they are doing accounting shenanigans above and beyond what 'normal' companies do to massage Quarterlies, but I have a feeling they might be. That said, I doubt this kind of taking advantage of early adopters connects to that (as the linked article seems to imply).

rumatt · 10-26-2018, 11:38 PM

A) holy shit.

B) not sure if this applies to existing owners but I'm gonna try.

https://twitter.com/elonmusk/status/1056025032617426945

JST · 10-26-2018, 11:53 PM

Quote:

Originally Posted by rumatt

A) holy shit.

B) not sure if this applies to existing owners but I'm gonna try.

https://twitter.com/elonmusk/status/1056025032617426945

I'm not going to sweat it. I got the car I paid for.

10-25-2018, 09:17 PM	#911
Josh (PA) Hello. Join Date: Mar 2004 Carmudgeonly Ride: '09 X3, '11 328xiT, '11 135i C, '17 c2, '19 X5 Location: Downingtown, PA Posts: 5,530	This is one of the many things keeps me from considering a Tesla. I have a 22 mile commute to work on the PA Turnpike, where I average 80 mph. I have no interest in driving 15 mph slower just to save battery life in case I need to run a few errands before I get home. FYI, here is a plot of speed vs battery drain and range vs speed at various temps from the Model S: these were enlightening to me with the speed I usually commute at. __________________ Josh (PA) - '19 X5 '17 991.2 C2 Cab '11 135i Convertible '11 328xiT '09 X3

10-25-2018, 09:38 PM	#912
ZBB Relic Join Date: Oct 2003 Carmudgeonly Ride: A very fast golf cart Location: The Valley of the Sun Posts: 12,821	You have a 22 mile commute and you are worried about range for a car with an EPA Rating of 310 miles? Plug in every night! Leave home at 90%. Even driving at 80 will result in you using well under 100 rated. And keep in mind that you also have the same impact on range from air resistance in an ICE. Do you keep extra gas at home just in case? __________________ ZBB

10-26-2018, 01:30 PM	#914
rumatt Mugwump Join Date: Oct 2003 Carmudgeonly Ride: E46 330i, Chevy Colorado, Tesla Model 3 Location: NY Posts: 17,475	I drove as gently as I could on the drive to work this morning. I accelerated gently at all times and for the highway portion I set the cruise at 62 mph (7 over the speed limit. I was literally the slowest car on the road - I passed 0 cars and was passed by about 1,000. I averaged 304 w/mile = 256 miles for the whole battery, 179 for 70% of battery (85 to 15) I'm going to read up on TMC about whether it's mostly the tires or wheels... But I'm thinking of buying the 18" TST wheels and putting on Conti DSW 06 all seasons for winter, and see how that impacts things. https://tsportline.com/products/18-t...=3900044640285 Last edited by rumatt; 10-26-2018 at 01:41 PM.

10-26-2018, 08:33 PM	#916
ZBB Relic Join Date: Oct 2003 Carmudgeonly Ride: A very fast golf cart Location: The Valley of the Sun Posts: 12,821	Are you tracking your rated miles used vs actual miles? Of course a higher Wh/mile means you will use rated miles up faster. But you are trying to figure out your realistic range so you can feel comfortable with doing side trips on top of your commute. In my case, my commute is typically about 49 miles, but can be 58 if I have to take the longer route both ways. In both the 3 and the S, I would get pretty close to rated range while driving, and lose a few miles to the vampire when parked. I’d use 55-65 rated miles, with an extra 10 on the coldest winter days, A 90% charge on the S was 167 miles for most o the last year. I’d get home after work anywhere between 105 and 120 miles remaining (the lower end only on the coldest days). So I had plenty of range to do other things if needed, In the 3, a 90% charge is 279 miles. I wasn’t charging every night, but even after 2 days of commuting I still had over 170 miles avail. That’s plenty of range to go do another drive... __________________ ZBB

10-26-2018, 02:10 PM	#915
equ Alphanumeric Join Date: Aug 2005 Carmudgeonly Ride: 981S, 340i Posts: 9,584	What about tire pressure? Is the factory using a higher load PSI to compute range and you're driving on more comfortable and likely better handling partial load PSI's? Do electric drivelines need to break in? I'd be surprised if they did. Or perhaps there are some error bars on the factory estimate and you're a little on the wrong side, probably no big deal.

10-26-2018, 10:46 PM	#917
JST 195 Join Date: Oct 2003 Posts: 24,609	https://electrek.co/2018/10/26/tesla...ation-holders/ Hm, this is kind of annoying. OTOH, I guess if id waited I might not have gotten the full tax credit, and probably would have gotten less for the Model S trade.

10-26-2018, 11:25 PM	#918
equ Alphanumeric Join Date: Aug 2005 Carmudgeonly Ride: 981S, 340i Posts: 9,584	I don't know if they are doing accounting shenanigans above and beyond what 'normal' companies do to massage Quarterlies, but I have a feeling they might be. That said, I doubt this kind of taking advantage of early adopters connects to that (as the linked article seems to imply).

10-26-2018, 11:38 PM	#919
rumatt Mugwump Join Date: Oct 2003 Carmudgeonly Ride: E46 330i, Chevy Colorado, Tesla Model 3 Location: NY Posts: 17,475	A) holy shit. B) not sure if this applies to existing owners but I'm gonna try. https://twitter.com/elonmusk/status/1056025032617426945