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Does anyone know what oil the factory fills these 6.7 up with at the factory? Is it the Motorcraft Synthetic Blend 10W-30, or something else? I am coming up on the first oil change and would like to use a Full Synthetic someday, but not yet! Also I have found the FL-2051 Motorcraft filters locally but I was thinking about using a WIX due to their great reputation. Just wondering what you guys are using out there and why?