Personally, I would get it changed. As much as you may think Ford will be paying the bill if it harms the engine...it may be you! A 5W20 oil (ie. somewhat light weight cold, AND light weight hot) is not necessarily a good thing. If the oil is too fluid at operating temperature, it may not provide adequate lubrication, and cause premature engine wear. Now is this likely to cause your engine to grenade??? no, probably not...but it may shorten the longevity of some parts...and that will end up costing you!
The 5W30 specified in the owners manual is a common grade, identical to the contour, and I would only deviate from that if I were living in very cold climates. Say, switching to a 0W30, for those cold morning start-ups. But over and above that...stick with whatâ??s in the owners manual.
