With 46,000 miles, it is possible but not probable that you have excessive wear in the engine bearings that would cause the low oil pressure at idle. 10 psi at idle while the engine is hot is acceptable though not preferred. Verify that the oil pressure gauge in the car is reading correctly. This can be done with a separate mechanical gauge. Also, make sure you are using the proper weight oil recommended by the manufacturer from a name brand oil company.
Friday, December 17th, 2010 AT 10:28 PM