Hello, I have neglected to check the oil quantity recently on our 2004 2.7 liter Sonota. My wife took me to the airport for a business trip and when she was going back home the oil light was on the entire trip. She drove it about 20 miles. She called and I had her check the oil after it sat about 1/2 hour. She called back and had to add 2 quarts to get it between the add and full line. She started it with no problems and said it sounds fine, but the oil light stays on. Where is a good place to check the oil pressure when I get back and what is the range it should be. If the pressure looks satisfactory and its just the pressure switch I plan to pull the filter, cut it open with a filter cutter to check for metal. So until I get back she has to drive my 79 dodge truck. Any advice would be appreciated.