The fifth-generation Explorer marked a big shift for Ford's long-running family hauler, trading the old body-on-frame truck roots for a car-based unibody platform. The result was a more comfortable, more carlike SUV that still offered three rows and plenty of room for the whole crew. It became a staple in driveways across the country for good reason. Powering this one is Ford's familiar 3.5L V6, a naturally aspirated gasoline engine rated at 290 horsepower from the factory. It's a straightforwa...