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      06-15-2018, 03:36 PM   #8
BMWrules7
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Drives: 2015, 740 LdX, Alpine White
Join Date: Mar 2011
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Quote:
Originally Posted by humbertob View Post
Quote:
Originally Posted by windowmaker View Post
How long is your commute (morning vs evening)? Could be that temps don't rise to full operating temperature until driven for a while longer and oil is still slightly warm by evening so initial heatup progresses faster. Have you tried taking a longer trip?
Morning and evening commute is exactly the same 16 miles, the only variable here is the outside temp !
5soko is spot on. The system is not calibrated to a degree certain above ambient. Nor is it calibrated to run at a single temperature.

Instead, the engine dynamically changes the operating temperature based upon driving dynamics.
This improves fuel efficiencies while reducing emissions or shifts to performance being the priority at the expense of fuel. In all cases, emissions are controlled to the best of the cars ability.
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