Cooler is better. Just make sure the computer is set to use the cooler temp. If you don't it'll look for the 190 temp and not find it.
Cold air and fuel make more power.
Ok, before someone else states it---engines make more power at 200 to 220 degrees. But, that is a racing engine. What you need is to have enough temp to get the oil up to about 180 to 200 degrees so that all the water vapor is steamed out.
