[masraum]

Originally Posted by p911dad

Interesting. I wonder how advisable it is to install a low temperature thermostat to the cooling system when replacing the water pump, something I am contemplating in the future for our 2008 997. I understand it makes the engine run about 20 degrees F cooler. Does this conflict with the goal of getting to operating temperature quickly? Or two different issues (high temp on long high speed operation)? Hmmm

I don't think running a cooler thermostat is going to impact the oil temp much.

I've run a durametric as a datalogger for my commute (84 miles each way). The water temp comes up a little faster than the oil temp. The oil temp then tends to run (in normal driving) 10-20º warmer than the water temp.

morning commute


afternoon commute ~4-5 hours after arriving.


In my commute, I was able to glance at the laptop screen from time to time to monitor the temps. I won't say that the two things are independent of each other, but I also don't think that they are correlated directly. For instance, a run up through the gears at high rpm has a bigger impact on the oil temp than the water temp. And if I stopped for gas, the oil temp seemed to cool off more than the water temp in the time that it took to pump gas.