1998 Jeep Cherokee mileage: 37,000. Low Oil pressure. When the engine is cold, the oil pressure is between 40-50 psi. However, after driving on the interstate for about 30-40 miles, the oil pressure drops to between 20-30 psi, and about 9 psi at idle. I use 10W-30 Pennzoil. I don't think there are enough miles on the engine for the pump/bearings to be worn, and I change the oil every 5000 miles. I am going to replace the sending unit, just to see if it makes a difference, any suggestions would be appreciated.
have the same problem?
Friday, December 10th, 2010 AT 7:14 PM