The type of power steering fluid the 2008 ford taurus uses is prestone. having good steering is crucial for changing lanes and moving about on the road. you will someday come across some problems though. it could turn to one side. the steering wheel may become stuck. the steering pump may become loose and that will spell disaster for your vehicle. the strut bearings might become bad. the rack mount can become faulty. steering fluid might leak at one point. the power steering fluid needs to be changed every 75,000 miles or so. along with replacing fluids, you will come across noises from steering parts. a loose bearing will become painful to the ear. a faulty bearing will make a terrible sound.
Going by the owners manual, the recommended power steering fluid listed by ford motor company is mercon atf fluid (xt-2-qdx /mercon),