[steve911T]

If you were burning 3 quarts of oil in 500 miles, you would look like you were spraying for mosquitos. Do you have oil spray under the tail and on the bumper? Put several quarts of oil in, use non synthetic 20-50, afraid to quote any brand, fill it up to about 1/4-1/2 on the dipstick and start checking it after each use. Also, pull a plug. they would almost certain to be black if you were actually burning that much. There is the Dorkiphus website for the DC/VA/MD area and lots of great help available from those people. Also, the o rings may be the orings on the oil return tubes that may be shot. You would lose a lot of oil from them, especially underneath the vehicle. Not too bad of a fix with engine in the car. Good luck.