Cold Start Delete: Do you still let the car idle?

Damage Inc · 11-24-2022, 03:42 PM

When I had cold start - I would let the car sit & idle until cold start cycle finishes then drive off.

With cold start delete, do you still let the car sit for 60 seconds or so, then drive off? Or drive off right away?

Personally, I will let the car idle for 90 seconds or so. Thinking to allow the oil to cycle. Am I wasting my time or is it good to allow the car to sit for a couple min before drive off - especially in the morning with a cold car?

NiBe · 11-24-2022, 03:49 PM

Start it up and drive. It is what BMW manual says and what you should do. My 2 cents.

mashimarho · 11-24-2022, 03:49 PM

Cold start is to warm up the cats. Did you remove yours?
Also, what octane fuel grade are you running?

Ajolives · 11-24-2022, 04:02 PM

I've had success with driving cars easy until they get up to operating temps. It's simple but day over day it adds up.

Pauliecas · 11-24-2022, 04:31 PM

Who honestly gets in the car and drives it immediately?

I put the ac/heat on, maybe send a text, find some good music, then its time to drive. That kills at least a minute or two from the initial start up.

If you don't do that, I would let it idle for at least 2 minutes before driving, especially if it's below freezing.

NiBe · 11-24-2022, 05:28 PM

Quote:

Originally Posted by mashimarho

Cold start is to warm up the cats.

Yes, exactly. For lower emissions, that' the only reason why the car does that - emissions regulations.

The other thing which needs to be warmed up are O2 sensors. It takes +- 30 seconds. Until they are warmed the car operates in open loop aka with no feedback from O2 sensors aka it typically runs more rich.

Redd · 11-24-2022, 05:52 PM

Oil pressure takes about 12-15s to build up in our cars. So chill for about 20s then drive below 3k rpms until oil temps are up to 85C.

NiBe · 11-24-2022, 06:56 PM

Quote:

Originally Posted by Redd

Oil pressure takes about 12-15s to build up in our cars. So chill for about 20s then drive below 3k rpms until oil temps are up to 85C.

Which is basically equivalent to "start it up and drive", well unless you floor it the first second it is started up. The engine is running and it does not care if the car is stationary or if it is moving.

On the other hand letting it idle for let's say 3 minutes is a bad habit which in long term is not good for the engine because gaskets are not warmed up and at idle the engine vacuum is the highest.

Scrippy · 11-24-2022, 08:21 PM

I always give it a minute or two. Then I keep it under 3k until normal temp is reached. After that it depends on how randy I feel. Every car/truck I've ever owned I do this. My Tundra lasted me 978,XXX miles before I sold it. My current M3 has 244,XXX. My opinion is I want oil warm enough to flow as needed in tight areas. Some extra food for thought….all my cars are California cars. I say this because my coldest temps are 30's max. If I lived in a colder climate I would find warmup even more paramount with respect to longevity.

Damage Inc · 11-24-2022, 10:07 PM

Quote:

Originally Posted by mashimarho

Cold start is to warm up the cats. Did you remove yours?
Also, what octane fuel grade are you running?

Still have cats.
I run 93 octane

jp1984 · 11-25-2022, 04:21 PM

Quote:

Originally Posted by Scrippy

I always give it a minute or two. Then I keep it under 3k until normal temp is reached. After that it depends on how randy I feel. Every car/truck I've ever owned I do this. My Tundra lasted me 978,XXX miles before I sold it. My current M3 has 244,XXX. My opinion is I want oil warm enough to flow as needed in tight areas. Some extra food for thought….all my cars are California cars. I say this because my coldest temps are 30's max. If I lived in a colder climate I would find warmup even more paramount with respect to longevity.

i actually dont believe this because any true car dork would have rolled that odometer over just to say they did.

Scrippy · 11-25-2022, 04:46 PM

Quote:

Originally Posted by jp1984

Quote:

Originally Posted by Scrippy

I always give it a minute or two. Then I keep it under 3k until normal temp is reached. After that it depends on how randy I feel. Every car/truck I've ever owned I do this. My Tundra lasted me 978,XXX miles before I sold it. My current M3 has 244,XXX. My opinion is I want oil warm enough to flow as needed in tight areas. Some extra food for thought….all my cars are California cars. I say this because my coldest temps are 30's max. If I lived in a colder climate I would find warmup even more paramount with respect to longevity.

i actually dont believe this because any true car dork would have rolled that odometer over just to say they did.

I really wanted to man. That truck was so good to me and I beat the shit out of it in the desert. It had 18" of travel in the front and 22" in the rear. I was gonna write a letter to Toyota but in the end I just sold it to some kid who wanted a badass off-road truck with almost a million miles.

BPMSport · 11-25-2022, 05:51 PM

Let idle for 20-30 secs, then drive off w/ easy RPM.

Scrippy · 11-25-2022, 10:36 PM

Quote:

Originally Posted by BPMSport

Let idle for 20-30 secs, then drive off w/ easy RPM.

NOT UNTIL TEMP IS REACHED! Besides whata you know?

Helmsman · 11-26-2022, 04:40 AM

Typically wait one minute for the cold start to settle. When I don't have time to wait, the DCT seem to slip in my uphill out of the garage. Seems the clutches need that little prewarming from the coolant.

sergbaja5t · 02-08-2023, 08:52 AM

I startup and I let it sit for 8-10min to get heat in the bearings/oil.
Im at @206k and no issues

M_Torx · 02-08-2023, 04:59 PM

have a really steep hill right after laneway have always let it run for a couple min to get some temp but if didn't have a super steep hill would definitely start and drive right away...

CamasM3e93 · 02-08-2023, 10:49 PM

Quote:

Originally Posted by Helmsman

Typically wait one minute for the cold start to settle. When I don't have time to wait, the DCT seem to slip in my uphill out of the garage. Seems the clutches need that little prewarming from the coolant.

Hey you should check out deansbimmer recent post on the sucking jet pump and the failing check valve in the aging dct….or something like that

ccdies79 M3 · 02-10-2023, 03:18 AM

The car is 12 years old, and mine came from New York, now it’s in Texas, to hell with warming it up,

Helmsman · 02-10-2023, 03:59 AM

Quote:

Originally Posted by CamasM3e93

Hey you should check out deansbimmer recent post on the sucking jet pump and the failing check valve in the aging dct….or something like that

Thanks, glanced through it but will take a closer look.

Cheers

11-24-2022, 03:42 PM	#1
Damage Inc Lieutenant Colonel 789 Rep 1,925 Posts Drives: 2017 M2 Join Date: Apr 2005 Location: Nashville iTrader: (1)	Cold Start Delete: Do you still let the car idle? When I had cold start - I would let the car sit & idle until cold start cycle finishes then drive off. With cold start delete, do you still let the car sit for 60 seconds or so, then drive off? Or drive off right away? Personally, I will let the car idle for 90 seconds or so. Thinking to allow the oil to cycle. Am I wasting my time or is it good to allow the car to sit for a couple min before drive off - especially in the morning with a cold car? __________________ Current: 17 OG M2 / R8 Performance Past Performance Cars: 01 M3, 05 M3, 06 M5, 08 M6, 08 M3, 11 M3, 13 M3, 15 M3, 911 C4S, 911 GTS, 17 M2,R8 V8, R8 RWS
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11-24-2022, 03:49 PM	#2
NiBe First Lieutenant 453 Rep 365 Posts Drives: BMW E91 & E92 Join Date: Nov 2021 Location: Europe iTrader: (0)	Start it up and drive. It is what BMW manual says and what you should do. My 2 cents.
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11-24-2022, 03:49 PM	#3
mashimarho BimmerPost Supporting Vendor 2106 Rep 13,876 Posts Drives: E92 M3 & F80 M3 & G82 M4 Join Date: Mar 2010 Location: Lynnwood, WA iTrader: (45) Garage List 2021 BMW G82 M4 [0.00] 2011 BMW E92 M3 [0.00] 2015 BMW F80 M3 [0.00] 2012 BMW 335i xDrive [9.78]	Cold start is to warm up the cats. Did you remove yours? Also, what octane fuel grade are you running? __________________ Mashimarho.com /// Instagram /// Facebook /// Youtube /// sales@mashimarho.com /// (425) 582-7939
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11-24-2022, 04:02 PM	#4
Ajolives Captain 922 Rep 933 Posts Drives: E90 M3 Join Date: Mar 2019 Location: Tampa iTrader: (0) Garage List 2019 Audi SQ5 [0.00] 2008 BMW M3 [0.00]	I've had success with driving cars easy until they get up to operating temps. It's simple but day over day it adds up.
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11-24-2022, 04:31 PM	#5
Pauliecas Private First Class 44 Rep 107 Posts Drives: 2012 BMW M3 Join Date: Jun 2022 Location: NJ iTrader: (0)	Who honestly gets in the car and drives it immediately? I put the ac/heat on, maybe send a text, find some good music, then its time to drive. That kills at least a minute or two from the initial start up. If you don't do that, I would let it idle for at least 2 minutes before driving, especially if it's below freezing.
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11-24-2022, 05:52 PM	#7
Redd Brigadier General 3897 Rep 4,162 Posts Drives: 2010 BMW E92 M3 Dakar Edition Join Date: Jul 2015 Location: Malaysia iTrader: (0)	Oil pressure takes about 12-15s to build up in our cars. So chill for about 20s then drive below 3k rpms until oil temps are up to 85C.
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11-24-2022, 08:21 PM	#9
Scrippy Lord Scrip 1812 Rep 3,013 Posts Drives: 2011 M3 Coupe Join Date: Jan 2012 Location: LA,Ca iTrader: (0) Garage List [0.00] 2007 BMW 335i [0.00]	I always give it a minute or two. Then I keep it under 3k until normal temp is reached. After that it depends on how randy I feel. Every car/truck I've ever owned I do this. My Tundra lasted me 978,XXX miles before I sold it. My current M3 has 244,XXX. My opinion is I want oil warm enough to flow as needed in tight areas. Some extra food for thought….all my cars are California cars. I say this because my coldest temps are 30's max. If I lived in a colder climate I would find warmup even more paramount with respect to longevity. __________________
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11-25-2022, 05:51 PM	#13
BPMSport BimmerPost Supporting Vendor 3387 Rep 7,541 Posts Drives: Harrop M3 / F10 M5 / F82 M4 Join Date: Apr 2008 Location: SoCal iTrader: (9) Garage List 2000 BMW M5 [0.00] 1990 BMW 735i Turbo [0.00] 2008 BMW M3 [7.50] 2015 BMW M3 [0.00] 2015 BMW M5 [0.00]	Let idle for 20-30 secs, then drive off w/ easy RPM. __________________ -----\| Like us on Facebook \| Instagram \|\| Tuning Information \| Remote Coding \|----- ----Visit us at www.BPMSport.com - Emotion. Driven. \| Toll Free: (888) 557-5133----
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11-26-2022, 04:40 AM	#15
Helmsman Major General 4465 Rep 7,109 Posts Drives: 2011 AW E90 M3 ZCP Join Date: Mar 2014 Location: Stockholm, Sweden iTrader: (0)	Typically wait one minute for the cold start to settle. When I don't have time to wait, the DCT seem to slip in my uphill out of the garage. Seems the clutches need that little prewarming from the coolant.
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02-08-2023, 08:52 AM	#16
sergbaja5t Private First Class 62 Rep 145 Posts Drives: 2011 E92-M3 Comp Join Date: Feb 2013 Location: United States iTrader: (0)	I startup and I let it sit for 8-10min to get heat in the bearings/oil. Im at @206k and no issues
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02-08-2023, 04:59 PM	#17
M_Torx First Lieutenant 328 Rep 341 Posts Drives: M Join Date: Jul 2018 Location: Ontario iTrader: (0)	have a really steep hill right after laneway have always let it run for a couple min to get some temp but if didn't have a super steep hill would definitely start and drive right away... __________________ TTP
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02-10-2023, 03:18 AM	#19
ccdies79 M3 Private First Class 128 Rep 100 Posts Drives: 2011 BMW M3 Join Date: Jan 2023 Location: Friendswood TX iTrader: (0)	The car is 12 years old, and mine came from New York, now it’s in Texas, to hell with warming it up,
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