I installed an
oil cooler to fill the cowling for the look but didn't connect it. Glad I didn't as my
oil temp runs 180* and never gets over 210* even in summer. A bigger concern, according to most "experts", is initial wear when
oil is cold. I installed an oil pre-heater and like that fact that I start off with oil temp at about 120* so it reaches optimal temperature a bit quicker.