A Ford vehicle's owner's manual lists the specific oil that vehicle needs. The required oil grade also may be imprinted on the oil cap or embossed on the dipstick.
Ford recommends oil changes every 7,500 miles or every 6 months, whichever comes first, for models manufactured in 2008 or later. Models manufactured through 2007 should have oil changes every 5,000 miles or every 6 months, whichever comes first.
Hard-driven vehicles, such as those used for towing, those driven long distances at slow speeds, and those driven off-road or on poorly maintained roads, need more frequent oil changes. 2008 vehicles and newer should have an oil change every 5,000 miles, and 2007 and older vehicles should have an oil change every 3,000 miles.