Apparently the mechanic changed the oil in my wife’s car and let us know that the oil filter had never been changed. I’ve taken the car for an oil change over about 4 times since it was purchased. I thought it was pretty standard procedure to get the filter changed and never asked for that “feature”.
Either way, the process got me questioning how it works and what it does.
Assumption: the oil system picks up dirt and other particles. the filter keeps those from entering into the engine and messing things up
Answer: does the above as well as transfer heat to help cool the engine. also takes care of all contaminants… like FUNGUS