Ford Grand Marquis 2006 Automatic Gasoline mileage: 300 KM or more Clean Grand Marquis, inspected and renewed. Has paint on the door and rear fender. Mileage: 500,000 km. The car is clean, solid, with a nice interior and ice-cold A/C. Good features, including heated and cooled seats. Defects: Consumes about a quarter can of oil on long trips. For sale to serious buyers.