Okay, now that I have your attention. I have heard different stories about checking oil level. Some say, "check cold". Others say, start engine for a minute, then check. I checked the oil on my Dodge Gr.Caravan this morning. Cold check (no start up) it shows to be a half quart low. After starting for a minute and getting the oil pressure up; it shows a full quart low. So how much do I add, half-quart or full quart?