On '96-01 Passports, it's not uncommon for vehicles to consume a quart of engine oil every 3,000 miles. Short trips, stop-and-go driving, extended idling,trailer towing and tired engine can increase oil consumption. Further inspection of engine components should be inspected such as , Valve cover gaskets, Front engine seals, rear engine main seal. Power steering system. Power steering pump, Power steering hoses, Rack and pinion. Your local repair shop should be able to perform and pinpoint exact location of oil leak by performing visual inspection.