Are most of you running the oil thermostat? I can't seem to find any information on purging the system with the thermostat. It seems to me that the thermostat redirects the flow through the oil cooler when the temp reaches a certain level and by purging a cold engine, the oil cooler is being bypassed. I had a small leak on one of my oil cooler fittings and may have allowed some air in. I need to purge but I want to make sure I do it right. Thanks, James Thomas