2007 Automatic Gasoline mileage: 291 KM Grand Marquis model 2007 American Car mileage 610 and can be increased Gear, differential, engine are clean The car needs consumables such as shocks, control arms, and sway bar links. As for the engine, spark plugs and valve cover gasket, this is what is clear to me. I don't know about the rest. Renewed and inspected. The car is for daily use and has no issues. It has hydraulics and is modified.