Start stop function

dk79 · 12-14-2018, 07:57 PM

Want to ask if you guys are using start stop function on your m5s?
I am using it and getting about 6 to 7 % improvement. 18mpg to 19mpg.
That translates to 400 dollars of savings and reduction of emissions during my 3 yr lease.
Does this negatively effect the engine? Reduce engine life?

dk79 · 12-14-2018, 07:59 PM

Technically I should not worry about engine life coz I will return the car at the end of lease term.

GUNGASLOW · 12-14-2018, 08:02 PM

I wish my wife’s mouth had a stop feature! It would definitely improve my long term life!

r33_RGSport · 12-14-2018, 10:30 PM

Quote:

Originally Posted by dk79

Technically I should not worry about engine life coz I will return the car at the end of lease term.

I would be more worry about your life.

Let's enjoy it in full. Start/Stop is ruining your life enjoyment.

mhh · 12-14-2018, 11:11 PM

I turn it off in my other cars but the Auto Stop/Start on the M5 is the smoothest and fastest I’ve experienced so I’m mostly happy to leave it on.

windtendo · 12-15-2018, 12:33 AM

I turned it off as I pulled out of the dealership. Hasn’t been on since.

Bönz · 12-15-2018, 08:01 AM

Quote:

Originally Posted by windtendo

I turned it off as I pulled out of the dealership. Hasn’t been on since.

This^^^^^^

themnmd · 12-15-2018, 08:29 AM

Start stop worse thing ever

josec70 · 12-15-2018, 09:06 AM

Start / Stop is awful .. off from Day 1.

BB TX · 12-15-2018, 09:08 AM

To each his own, but I don't like start/stop and turned it off before leaving the dealership. I've tried the setting, but didn't like the little shudder on the restart. No matter that it's almost imperceptible, I do notice it. And it's really annoying in those situations where it turns off the engine, but your stop is so short that you need to move again right away.

There is propaganda out there saying start/stop won't affect engine and starter life, but I don't buy a lot of it.

A non start-stop vehicle might experience 40k to 50k starts during its lifetime. Using start/stop, the vehicle might experience 10X that amount! While the engineering used to design start/stop systems might anticipate 500k cycles, why stress the system that many times if not necessary?

You might not care since you're on a lease, but I'm keeping my car long term, and I don't view $100 or so in annual savings as worth the risk of a wear/tear repair on a vehicle as expensive as an M5 that might be experiencing a lot of city start/stop driving. On a 3 year lease, I see why it might be worth the savings to some people. But honestly, if I was spending $60,000+ on a 3 year lease, the $400 in savings wouldn't be worth the small aggravations of the system.

Here's a fairly objective article describing some of the wear and tear issues and engineering attempts to overcome them:
Long Term Impact of Start/Stop

Cheers,
B B

F90M5C · 12-15-2018, 02:30 PM

Quote:

Originally Posted by windtendo

I turned it off as I pulled out of the dealership. Hasn’t been on since.

i really wish mine worked that way

only non European cars can do that . I have to turn it off after each start

Alberta · 12-15-2018, 02:45 PM

Same here ... I make sure to never forget to turn it off.

TheRealBob · 12-15-2018, 03:06 PM

Always off, but I do enjoy shutting it down at a drive-thru, just because it sounds SO good when I start it up again.

riceman · 12-15-2018, 05:22 PM

Depends on my mood. When I'm out and roads are mostly open, I keep it off. When I'm stuck in Atlanta traffic, on it goes. No need to waste fuel sitting in traffic going nowhere. I turn on all the assists in traffic (driving, hold, steering, start/stop, etc). I've found my commute to be pretty tolerable now. Car can be a luxury cruiser when I want, and supercar when I want.

Miko M · 12-15-2018, 05:55 PM

You can save more money by driving it slow. Lol That completely defeats the purpose on sports car, you want to let her rip and enjoy

r33_RGSport · 12-15-2018, 07:49 PM

Quote:

Originally Posted by F90M5C

i really wish mine worked that way

only non European cars can do that . I have to turn it off after each start

You can get it coded.
I haven't code F90 since US already off by default, but it should do-able.

themnmd · 01-06-2019, 08:59 PM

Worst thing ever put in a car

GUNGASLOW · 01-06-2019, 09:03 PM

Start stop is stupid.. get a prius if you want to save gas

rsalt333 · 01-06-2019, 09:38 PM

Off at Welt on pickup.

soopa · 01-06-2019, 10:55 PM

I turn it off. Its the first thing I do when I get in the car!

12-14-2018, 07:57 PM	#1
dk79 First Lieutenant 84 Rep 346 Posts Drives: 2018 F90 M5 Marina bay blue Join Date: Feb 2013 Location: Gilbert, AZ iTrader: (0)	Start stop function Want to ask if you guys are using start stop function on your m5s? I am using it and getting about 6 to 7 % improvement. 18mpg to 19mpg. That translates to 400 dollars of savings and reduction of emissions during my 3 yr lease. Does this negatively effect the engine? Reduce engine life?
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12-14-2018, 07:59 PM	#2
dk79 First Lieutenant 84 Rep 346 Posts Drives: 2018 F90 M5 Marina bay blue Join Date: Feb 2013 Location: Gilbert, AZ iTrader: (0)	Technically I should not worry about engine life coz I will return the car at the end of lease term.
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12-14-2018, 08:02 PM	#3
GUNGASLOW Banned 192 Rep 390 Posts Drives: 2019 M5 Join Date: Jun 2018 Location: Salem MA iTrader: (0)	I wish my wife’s mouth had a stop feature! It would definitely improve my long term life!
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12-14-2018, 11:11 PM	#5
mhh First Lieutenant 80 Rep 308 Posts Drives: Audi RS6 Join Date: Jan 2012 Location: Australia iTrader: (0)	I turn it off in my other cars but the Auto Stop/Start on the M5 is the smoothest and fastest I’ve experienced so I’m mostly happy to leave it on.
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12-15-2018, 12:33 AM	#6
windtendo Lieutenant Colonel 1716 Rep 1,910 Posts Drives: 2023 M5C Join Date: Apr 2013 Location: Houston iTrader: (1) Garage List 2023 BMW M5C [0.00] 1989 BMW M3 [0.00]	I turned it off as I pulled out of the dealership. Hasn’t been on since.
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12-15-2018, 08:29 AM	#8
themnmd Colonel 1691 Rep 2,699 Posts Drives: 23 X5MC Join Date: Sep 2018 Location: San Rafael CA iTrader: (0) Garage List 2020 BMW M340i X [0.00]	Start stop worse thing ever
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12-15-2018, 09:06 AM	#9
josec70 Major General 4079 Rep 5,235 Posts Drives: 22' Individual Chalk M5C Join Date: Dec 2015 Location: Miami iTrader: (2)	Start / Stop is awful .. off from Day 1. __________________ CURRENT: 22' INDIVIDUAL M5\| CHALK \| TARTUFO \| CCB \| MPE \| H&R \| IND GONE: 19' M5C\| SINGAPORE GREY\| ARAGON\|VELOS VLS-06\|H&R\|iPE\|IND\|XPEL\|CF\|RADENSO GONE: 15' F10 M5\|BSM\|BLACK\|VELOS VSS-S2\|KW\|AKRA\|IND\|CF \|ESCORT 360\|VELOS PIGGY GONE: 13' F10 M5\|SG\|BLACK\|AKRA\|KW\|IND LONG GONE: 09' E60 M5\|02' E39 M5
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12-15-2018, 09:08 AM	#10
BB TX Enlisted Member 51 Rep 31 Posts Drives: 2019 M5 Join Date: Jul 2018 Location: Austin, TX iTrader: (0)	To each his own, but I don't like start/stop and turned it off before leaving the dealership. I've tried the setting, but didn't like the little shudder on the restart. No matter that it's almost imperceptible, I do notice it. And it's really annoying in those situations where it turns off the engine, but your stop is so short that you need to move again right away. There is propaganda out there saying start/stop won't affect engine and starter life, but I don't buy a lot of it. A non start-stop vehicle might experience 40k to 50k starts during its lifetime. Using start/stop, the vehicle might experience 10X that amount! While the engineering used to design start/stop systems might anticipate 500k cycles, why stress the system that many times if not necessary? You might not care since you're on a lease, but I'm keeping my car long term, and I don't view $100 or so in annual savings as worth the risk of a wear/tear repair on a vehicle as expensive as an M5 that might be experiencing a lot of city start/stop driving. On a 3 year lease, I see why it *might* be worth the savings to some people. But honestly, if I was spending $60,000+ on a 3 year lease, the $400 in savings wouldn't be worth the small aggravations of the system. Here's a fairly objective article describing some of the wear and tear issues and engineering attempts to overcome them: Long Term Impact of Start/Stop Cheers, B B
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12-15-2018, 02:45 PM	#12
Alberta Lieutenant Colonel 2038 Rep 1,843 Posts Drives: F90 Join Date: Aug 2015 Location: somewhere iTrader: (0)	Same here ... I make sure to never forget to turn it off.
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12-15-2018, 03:06 PM	#13
TheRealBob Second Lieutenant 255 Rep 255 Posts Drives: '18 Bluestone M5 Join Date: May 2018 Location: North Florida iTrader: (0)	Always off, but I do enjoy shutting it down at a drive-thru, just because it sounds SO good when I start it up again.
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12-15-2018, 05:22 PM	#14
riceman Enlisted Member 15 Rep 44 Posts Drives: 2022 M8 GC Join Date: Sep 2018 Location: Atlanta Metro iTrader: (0)	Depends on my mood. When I'm out and roads are mostly open, I keep it off. When I'm stuck in Atlanta traffic, on it goes. No need to waste fuel sitting in traffic going nowhere. I turn on all the assists in traffic (driving, hold, steering, start/stop, etc). I've found my commute to be pretty tolerable now. Car can be a luxury cruiser when I want, and supercar when I want.
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12-15-2018, 05:55 PM	#15
Miko M ///M 6656 Rep 3,683 Posts Drives: 2020 M2C. 2020 X3M Join Date: May 2018 Location: Wisconsin iTrader: (0)	You can save more money by driving it slow. Lol That completely defeats the purpose on sports car, you want to let her rip and enjoy __________________ Life is too short...enjoy your life ///M
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01-06-2019, 08:59 PM	#17
themnmd Colonel 1691 Rep 2,699 Posts Drives: 23 X5MC Join Date: Sep 2018 Location: San Rafael CA iTrader: (0) Garage List 2020 BMW M340i X [0.00]	Worst thing ever put in a car
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01-06-2019, 09:03 PM	#18
GUNGASLOW Banned 192 Rep 390 Posts Drives: 2019 M5 Join Date: Jun 2018 Location: Salem MA iTrader: (0)	Start stop is stupid.. get a prius if you want to save gas
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01-06-2019, 09:38 PM	#19
rsalt333 Private First Class 50 Rep 128 Posts Drives: 2018 F90, 2024 X5 xDrive50e Join Date: Dec 2013 Location: Chicago iTrader: (0)	Off at Welt on pickup.
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01-06-2019, 10:55 PM	#20
soopa Second Lieutenant 113 Rep 275 Posts Drives: 2018 F90 M5 Join Date: Sep 2018 Location: Seoul, Korea iTrader: (0)	I turn it off. Its the first thing I do when I get in the car!
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