Quote:
Originally Posted by No one
Well, it's not that I am interested in tuning or supervising(/competing with  ) BMW engineers. Yet, "as far as I know" tempts for a bit of distinct definition.  It's not to feed incompetent judgement/decisions, just to share some information I appear to have very little other use for.
I have like a BMW N13 (of June, 2011) technical training brochure (non-English) downloaded from a local site - FWIW! It says the following.
Three temperature regimes are supported:
- 109º C - economy;
- 106º C - normal;
- 80º C - high.
The cooling system allows higher temperature to save fuel due to lower friction in the economy mode and maintains lower operating temperature for higher torque due to higher repletion in the high mode. (The "driving experience" switch is not mentioned. "Dynamic indicators"-based recognition of the driver's wish is.)
System protection:
- Parts protection:
- Coolant temperature is 117º C or higher;
- Oil temperature is 143º C or higher.
Measures taken: for example, cabin cooling and engine power reduction.
- Emergency:
- Coolant temperature is 122º C or higher;
- Oil temperature is 151º C or higher.
Measures taken: for example, engine power reduction (to 90% approx.).
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Thanks for the info! I read in other forums 125º was quite high, but nothing "official". What would be interesting to know is the temperature limit of the oil before starting to lose performance. I will share it if find it.