Interesting point regarding the CFS radiator upgrade. I noticed one day this past summer, I was out at night, and I am not a real A/C person, like the windows down most of the time. But I was driving for awhile and keeping an eye on the oil temps,(no oil cooler yet) oil temp was around 220, flipped the A/C on because it was getting hot in the car,(you know how the car loves to toast your feet) and after awhile the oil temps went down from the radiator fans running when the A/C is on. oil temp went down to 200. Since the radiator has a direct function in removing engine heat it has the same effect on the oil temperature, its all about removing BTU's.
Going with the radiator upgrade is a cleaner way and than you could always up grade to and oil cooler if needed,
But since I already bought an oil cooler and not installed at that time, its a moot point. I installed a 25 row Z-1 oil cooler, the reason I went with Z-1 was the bigger oil lines, less pressure drop.
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