Concern with Oil Cooler / Oil Temps

[PharmDZ]

Hey everyone - I just had the 25 row Z1 oil cooler kit installed with the thermostatic switchplate as well. I know it has been cold here in Jersey (around 35-50 degrees depending on when I'm driving the car to work) but it seems like the oil temps have a hard time getting above 160 degrees unless the car is driven slightly harder. The highest I've seen is about 180 on a 50-60 degree day, which I know is more around the optimal temperature. Is it a problem if I keep seeing these 160ish degree temps? I'm sure it will probably be fine through the spring/summer as the temperature warms up, but I guess I expected the oil temps to get a bit hotter than that with the switchplate.