Several companies refine and produce oil for Motorcraft. The specification that the oil must meet is the key - not the supplier. You can use a full synthetic as long as it meets the Ford specs.
Motorcraft oils are formulated to meet the specification every batch - every test. Some oil suppliers will continue to test a marginal formulation untill they get a (lucky) pass - even though 9 prior attempts with the same formulation failed. All they need is one documented pass to say they met the spec.
As long as you are going to the expense of using a full synthetic, why not use 0w20. That will avoid even more wear at start-up.
Don't let anyone tell you that you need up to a 30 weight oil unless you are constantly towing or racing your vehicle (and operating temps will be up to 300+ degrees). You will not protect the engine with a heavy weight oil, just cause more wear at start-up.
Which Motor Oil Is Better?
in 2008 Edge & MKX
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