During ZdayZ on the dragon I was getting 240+ with no oil cooler and it was only ~65-70 degrees outside in the morning.
I installed the 19 row with non thermostatic plate (Z1 kit). Knocked ~20 degrees off spirited driving temps.
Did autocross yesterday as part of the ZCON event. A friend from out of town drove my car as well. We did 24 runs with outside temps of >95 degrees! Temp never got over ~225!
At first I was a little worried about getting the non thermostatic plate but living in Savannah Georgia (and talking to Z1) and seeing the results I am more than happy. If I had gotten a cooler larger than 19 row I would have definitely gotten the thermostatic plate.
Best money I have spent on the car yet.