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      08-27-2020, 01:47 PM   #89
TXSchnee
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Originally Posted by puckybadger View Post
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Originally Posted by TXSchnee View Post
Will have to see how the mild hybrid is implemented on the 40i, does it smooth out the start/stop enough so it is unobtrusive, if so then removing the shut off switch is fine. Honestly, after having my PHEV for a month, I cannot imagine going back to a pure ICE vehicle again, unless it was something like a full M or AMG.
Take a spin in a M50i and you might change your mind about ICE's
My Cayenne is a 455hp PHEV, 0-60 is slightly slower at 4.2 seconds vs the 3.9 seconds of the M50i, but I will return 28mpg vs 12mpg or less in the M50i. I had a '17 Audi S6 previously, and V8's are awesome, but I also have little kids, so being ecologically more responsible is also awesome. Edit to add: I do currently have 45e on order, it was pushed back and I was never able to get a test drive before my Cayenne came in. So very shortly there will be a very well optioned X5 45e in the Austin area if anyone is going to be looking.
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      08-27-2020, 03:56 PM   #90
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I still hate it. Coded mine so it stays off. My driving is 90% interstate highway with no stops. ASS wouldn't increase my mileage.
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Last edited by rmorin1249; 08-28-2020 at 09:07 AM..
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      08-28-2020, 07:08 AM   #91
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Can you provide what real world MPG you are getting city/highway?
Yes. I drive 60 miles round trip 6 days a week, 90% interstate. I am averaging 20.8 MPG
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      08-28-2020, 10:01 AM   #92
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Ouch, I get 32mpg on my 4-cyl 2020 X3 for that driving.
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      08-28-2020, 01:45 PM   #93
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Originally Posted by rdwboulder2 View Post
Just heard from Dealer that it has been eliminated.
Wow cool, hope it's a trend
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      08-28-2020, 06:15 PM   #94
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Originally Posted by Mile muncher View Post
I could see this being more about emissions standards than absolutely minuscule MPG improvements.
Actually, the fuel saving is not minuscule at all.
Edmunds did a test, and they got 2.9 to 10.9% fuel saving.
https://www.edmunds.com/car-reviews/...save-fuel.html

And in this test, ASS managed 10% fuel saving:
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      08-28-2020, 11:36 PM   #95
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Originally Posted by nosnoop View Post
Actually, the fuel saving is not minuscule at all.
Edmunds did a test, and they got 2.9 to 10.9% fuel saving.
https://www.edmunds.com/car-reviews/...save-fuel.html

And in this test, ASS managed 10% fuel saving:
Good to know. I guess I was thinking more about the mild hybrid system than ASS and conflated the two in my head. Specifically, I was confused after seeing the EPA ratings for the X5. The 2021 X5 40i gets 21/25 while the 2020 gets 20/26. 23 combined mpg for 2021 vs 22 for 2020 so overall fewer emissions. But I am not sure why it would be necessary to make ASS mandatory if the EPA tests likely donít disable that feature anyway. Perhaps the EU assesses manufacturers more favorably if ASS is mandatory.

Again, thinking about the mild hybrid system, my assumption was that a few grams saved of co2 would be more important than a 1 mpg (~ 5%/minuscule in my head, especially given the difficulty of actually achieving EPA combined fuel economy in the real world) gain for a manufacturer. Yes, 5% better fuel economy would logically lead to 5% fewer emissions but I just assumed that the 5% emissions component would be more important than the 5% MPG gain. Weirdly, the X7 40i gets 19/24 for 2021 vs 20/25 for 2020 so not sure how the mild hybrid helps there.
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      08-29-2020, 12:30 AM   #96
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Originally Posted by Mile muncher View Post
But I am not sure why it would be necessary to make ASS mandatory if the EPA tests likely don't disable that feature anyway.
Here's my take. ASS in a mild hybrid is not exactly what we're used to. In the current model the motor stops when the vehicle comes to a full stop. And it starts as soon as you intend to drive away. And there's some delay between intending to drive (letting the brake pedal go or pressing the gas pedal if in auto-hold mode), even if it's tiny. But you still notice it. In a mild hybrid it won't be noticeable because the vehicle starts moving on a battery and the engine gets connected shortly afterwards when it's restarted. So other than sound and some vibration you shouldn't really notice it stopping and restarting.

So maybe it's not about HAVING to make ASS mandatory but rather about it evolving so the reason why people would disable ASS in the past not being present anymore.
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      08-29-2020, 04:25 AM   #97
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So maybe it's not about HAVING to make ASS mandatory but rather about it evolving so the reason why people would disable ASS in the past not being present anymore.
Well said. I think so too.

Thinking about the en environment is one step at the time and a lot of small efforts still can make a big difference.

That said. I know the even 45e is not environmentally friendly. Even with when driving electric all the time.
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      08-29-2020, 12:02 PM   #98
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Ouch, I get 32mpg on my 4-cyl 2020 X3 for that driving.

Ah, yes it should- it's a little 4 banger. Not a 523 HP Twin Turbo 4 cam 32 valve V8.
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      08-30-2020, 06:56 AM   #99
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Quote:
Originally Posted by volodp View Post
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Originally Posted by Mile muncher View Post
But I am not sure why it would be necessary to make ASS mandatory if the EPA tests likely don't disable that feature anyway.
Here's my take. ASS in a mild hybrid is not exactly what we're used to. In the current model the motor stops when the vehicle comes to a full stop. And it starts as soon as you intend to drive away. And there's some delay between intending to drive (letting the brake pedal go or pressing the gas pedal if in auto-hold mode), even if it's tiny. But you still notice it. In a mild hybrid it won't be noticeable because the vehicle starts moving on a battery and the engine gets connected shortly afterwards when it's restarted. So other than sound and some vibration you shouldn't really notice it stopping and restarting.

So maybe it's not about HAVING to make ASS mandatory but rather about it evolving so the reason why people would disable ASS in the past not being present anymore.
^^ This.
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      08-30-2020, 10:00 PM   #100
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Quote:
Originally Posted by volodp View Post
Here's my take. ASS in a mild hybrid is not exactly what we're used to. In the current model the motor stops when the vehicle comes to a full stop. And it starts as soon as you intend to drive away. And there's some delay between intending to drive (letting the brake pedal go or pressing the gas pedal if in auto-hold mode), even if it's tiny. But you still notice it. In a mild hybrid it won't be noticeable because the vehicle starts moving on a battery and the engine gets connected shortly afterwards when it's restarted. So other than sound and some vibration you shouldn't really notice it stopping and restarting.

So maybe it's not about HAVING to make ASS mandatory but rather about it evolving so the reason why people would disable ASS in the past not being present anymore.
I hope that is the case with the mild hybrid. In stop and go traffic, where youíre mainly pressing and releasing the brake, I wonder whether the mild hybrid system alone would be able to move the car.
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      09-17-2020, 01:10 PM   #101
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Quote:
Originally Posted by rmorin1249 View Post
I still hate it. Coded mine so it stays off. My driving is 90% interstate highway with no stops. ASS wouldn't increase my mileage.
going to have to look into this for mine. Im not a fan of the ASS feature
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      09-17-2020, 06:39 PM   #102
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Quote:
Originally Posted by TXSchnee View Post
My Cayenne is a 455hp PHEV, 0-60 is slightly slower at 4.2 seconds vs the 3.9 seconds of the M50i, but I will return 28mpg vs 12mpg or less in the M50i. I had a '17 Audi S6 previously, and V8's are awesome, but I also have little kids, so being ecologically more responsible is also awesome. Edit to add: I do currently have 45e on order, it was pushed back and I was never able to get a test drive before my Cayenne came in. So very shortly there will be a very well optioned X5 45e in the Austin area if anyone is going to be looking.
M50 is not 12MPG. Maybe if you drive it on the track.
I get 19-20 around town easy. Its not 28 I agree. But it will blow cayenne and 45 e off in any situation on the highway and off the lights. the smile on my face each time I floor it is so worth 8 MPg at 2 bucks a gallon
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      09-17-2020, 06:54 PM   #103
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Quote:
Originally Posted by Ilyam5 View Post
Quote:
Originally Posted by TXSchnee View Post
My Cayenne is a 455hp PHEV, 0-60 is slightly slower at 4.2 seconds vs the 3.9 seconds of the M50i, but I will return 28mpg vs 12mpg or less in the M50i. I had a '17 Audi S6 previously, and V8's are awesome, but I also have little kids, so being ecologically more responsible is also awesome. Edit to add: I do currently have 45e on order, it was pushed back and I was never able to get a test drive before my Cayenne came in. So very shortly there will be a very well optioned X5 45e in the Austin area if anyone is going to be looking.
M50 is not 12MPG. Maybe if you drive it on the track.
I get 19-20 around town easy. Its not 28 I agree. But it will blow cayenne and 45 e off in any situation on the highway and off the lights. the smile on my face each time I floor it is so worth 8 MPg at 2 bucks a gallon
I was going off the 9mpg I averaged in my S6. 😁 That said, at 455hp, 134 of which is electric and immediate, you may not beat me off the line (I know you'd catch up eventually). Still not at my 1200 mile break in so I haven't pushed it hard, but it is quick.
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      09-17-2020, 08:39 PM   #104
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I never use auto start stop and always turn it of before I press the start button. It is so robotic now that it has become a mindless operation and not a big deal. I would not be happy if I had a 2021 without the opportunity to quickly turn it off.
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      09-17-2020, 09:50 PM   #105
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I just checked with the Hong Kong BMW dealer. The MY 2021 X5 won't have a 48V battery. So i think it is country by country based on the local regulation. FWIW...
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      09-17-2020, 09:58 PM   #106
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Originally Posted by 84illini View Post
Confirmed-the 2021 X5 removes the ability to turn off auto start/stop. This was relayed to me by the genius at the dealership. It was said it was removed due to "government regulations". It was recommended to set up an individual sport profile with all comfort settings except turning off auto start stop. This way you can drive in "comfort mode without auto start/stop. The downside is you have to select this every time as comfort is the default.

Hopefully the programmers can code something!!
Count myself lucky that my MY20 I can turn it off with a click of a button. I would actually prefer to code it off by default.

The logic behind ASS is too unpredictable from driver's point of view. How many times I slow down enough to the stop sign and just about to go that ASS decided to shut down the engine. As I press the accelerator pedal, it wakes up agsin within like 200ms.... Totally useless
When I first picked up my m50i, I hated the ASS feature. I hated with a passion. However, as I drive more and more, it became less irritaing. Don't get me wrong, I still hated it. But Once I found this little timer telling me that ASS had cut off the engine 2hrs since my last refueling, I was impressed. That is 2hr less of burning petrol for nothing.
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      09-17-2020, 10:15 PM   #107
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Coded off in my M50i. No V8 deserves this constraint - let is sit and purr!
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      09-18-2020, 03:10 AM   #108
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Quote:
Originally Posted by zhangyi17 View Post
When I first picked up my m50i, I hated the ASS feature. I hated with a passion. However, as I drive more and more, it became less irritaing. Don't get me wrong, I still hated it. But Once I found this little timer telling me that ASS had cut off the engine 2hrs since my last refueling, I was impressed. That is 2hr less of burning petrol for nothing.
On the other hand, when the engine is not running, your car is discharging the battery. When the engine starts again, it will use more fuel than normally because it has to recharge the battery. This will shorten the battery service life and put extra wear on starter motor. Not sure what the net result is. :-)
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      09-18-2020, 06:48 AM   #109
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When the engine starts again, it will use more fuel than normally because it has to recharge the battery.
This is not correct since the X5 uses the brake energy regeneration system.

https://www.autobytel.com/car-owners...ration-123423/
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      09-18-2020, 07:44 AM   #110
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Quote:
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This is not correct since the X5 uses the brake energy regeneration system.

https://www.autobytel.com/car-owners...ration-123423/
How is it not true? Sure, the car charges the battery when you slow down, but if regeneration lasts for a few seconds and the alternator can only charge at, say, 2 kW, the amount of energy recovered is pretty small. (And the battery may not use too many amps to charge unless it's real empty.)
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