There is an industry metric called cost of ownership. The lower the cost, the better the rating. For the average person, semi-synthetic Motorcraft oil is going to provide adequate protection for the life of the vehicle without any issues.Of course I thought of that, but they only are filling the engine once. Don’t they make $ every time we do an oil change using Motorcraft oil? I would think they would make a little more $ with us buying full synthetic. So for a few dollars Ford would rather us not use the best oil in our truck?
However, for those that run their vehicles hard, operate in extreme high or low temperatures, tow, haul, or off-road, full synthetic is going to provide the best protection.