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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > User Manual says not to wait for the car to warm up, and to start driving right away



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      01-12-2013, 10:42 AM   #67
Newman028
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When its nice out, i just start and go. But when its freezing and my car isn't garaged over night, hell yea I let her sit for 5 mins. I am not a fan of getting in a freezing car at 6 AM. And this is coming from a Boston boy living in Atlanta, well for now.
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      01-13-2013, 06:04 AM   #68
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Quote:
Originally Posted by BEAR-AvHistory View Post
The Greens & the guys in black helicopters make them tell you to drive off right away so they can save the world, give me a break.
Don't be such an arrogant, aggravating troll.

Did I set out to insult you? No.

So why do you make such an insulting comment?

I guess you jump in your plane and are at full throttle down the runway before you have any heat in the engine, yes?

And I suppose the LAWS in Germany on not warming up before driving off are all about protecting engines, are they?

Yeah, right.
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      01-13-2013, 07:17 AM   #69
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So just a few technical notes here. First, the N52 and N52 have an oil lubrication system that includes a constant-pressure oil pump, so the oil pressure does not vary over the RPM range like traditional engines. Second, both the N52 and N54 have an electric water pump that is computer controlled and allows for very fast warm up of the engine (intentional so to keep cold-start emissions to a minimum). Third, multi-viscosity oils such as 5W-30 flow at -35F and can provide lubrication to the bearings and other internal engine parts at very low temperatures.

The reason the engine should not be run at high RPM when cold is to prevent damage to various internal components that are designed to provide maximum power at operating temperature, which means when all the bearing tolerances are within the proper limits after the metals have reached the proper expansion points.
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      01-13-2013, 08:43 AM   #70
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Originally Posted by straightcashhomie View Post
...I wait at least 1 minute until my rpms drop a little and then leave.
Same here! Soon as the rpms drop a bit I drive away. I figure it gives the oil a chance to flow to all parts of the engine. (Probably more psychological)
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      01-13-2013, 08:58 AM   #71
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Mines is in a garage but I still let run for 10 minutes and at work as well.
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      01-13-2013, 10:08 AM   #72
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Quote:
Originally Posted by Goofyguy View Post
Is it anything like the S65 4 litre v8 in the M3. That thing just sounds nasty till its warm. Almost as if the gaskets are all lose until heat expansion seals it up.
Good example of a M5 on a cold start ->http://youtu.be/8nGdmHPRx_Q
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      01-13-2013, 09:00 PM   #73
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Originally Posted by 3s4u2 View Post
Good example of a M5 on a cold start ->http://youtu.be/8nGdmHPRx_Q
Sure that wasnt Blue Man Group warming up? I dunno, I kinda like it. Again if you dont know what to expect it would be concerning. I think ive figure out what I want next too!
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      01-14-2013, 08:42 AM   #74
3s4u2
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Quote:
Originally Posted by Goofyguy View Post
Sure that wasnt Blue Man Group warming up? I dunno, I kinda like it. Again if you don't know what to expect it would be concerning. I think ive figure out what I want next too!
Didn't really say that I don't like the way it sounds, it's just that everyone else know exactly when its started, no sneaking out with the M5.

I just prefer to let this car worm-up a bit, it's not like fuel economy should even be a consideration with a V10!
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