Homie do you even read responses to your other posts? You've asked this a few times already.
If you race the car (not auto x, but road course racing), get an oil cooler. Also a good idea if you're doing back to back roll races on the highway like 60-130 or something of the sort.
If it's a street car, it's absolutely unnecessary. Only reason to get one for a street car is if you're going to delete the grill, get a tubular crash bar, and mount it visibly so it looks "cool" if you're into that sort of thing.
Thank you for coming to my TED Talk