i never put a lot of stress on the engine, the max speed i usually drive is 65mph, rpm's rarely ever go over 3000 unless i go fast from a stop. will putting less stress on the engine through the way u drive make the head gaskets last longer? or is it doomed to fail once your number is up?
also, i know there is air passing through my heater core, because i can hear it.(it makes those water sounds) will this same air go into the engine and cause it to mess up the gasket or is this air confined to the heater core? thanks.