Civ: I really enjoyed your post. Very complete, and written with an engaging style. I don't see the point of lowering the thermostat opening point, myself, given the efficiency losses and increased wear related to lower temperatures, in the interest of extending the life of plastic parts inside the engine which are already eleven years old. But that doesn't matter. You did it because it was interesting, and I found it interesting as well. Thanks for posting.

Jeff

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue