OP - I live in Houston and my oil temps run at about 218 - 220 all day long, no matter what the temp is outside. I drive the Z pretty hard most of the time. Before you go and drop $800+ on an oil cooler setup I suggest you drive it a little more. Get the oil change to a synthetic and then see where the temps are. 220 - 230 is not a bad temp for the oil.
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wax
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