There is no crying need for a larger oil cooler at the power levels we see. Again, read on.
Most turbo engines use a highly efficient oil to water intercooler just above the oil filter. It is copper finned, just as efficient and roughly 10 times smaller that an common oil to air cooler most of us are familiar with. Water holds about 10 times as much energy as air for ever degree in temperature. The really neat feature of this oil/water intercooler is the pre-heating of the engine oil that takes place during engine warm-up. Revving an engine past 4000 rpm on cold oil is generally not a good idea, but the engine is warming it oil up as the engine water is coming up to temperature. So about two minutes after your water temp is up to running level your engine is ready to run hard. Life could not be better.
If we run a 360hp engine, yes we can begin to see the need for greater engine cooling, and a larger oil cooler is one important way of doing this, but we should still keep the water/oil cooler in place and run a thermostat on the large air to air oil cooler if it is a daily drive. Cold oil and high revs are death.