Originally Posted by PaulZ370

I have a 19-row oil cooler, and when I first installed it, I suffered extremely long oil warm-up times. I like to see at least 180°F on my oil temp's before I shut her off again because I want to make sure that any water residue from the internal combustion reaction that made it into the oil is evaporated out and not remain in the sump contaminating it. My solution was to place a thin aluminum plate as an air-barrier on the front of the cooler blocking off all but 4-5 rows on top. I secured it with industrial strength double stick tape to hold it in place.

Even now, during winter time in 40-ish degree weather, my commute to work (9 mile trip) I am barely at 180°F even though I'm driving in traffic conditions with a few lights. During the summer, with 80/90°F temps, it still takes about 5-8 minutes before temps reach 180, and then stabilize around 200°F under normal driving conditions. Under spirited driving, oil temps climb to 210 - 220°F depending on ambient temp and how hard I'm pushing, but cool off relatively quickly afterwards when I return to normal driving (steady speed, no hard acceleration).

Hope this helps in better understanding what you might want to do.