FL400S. 4 to 4.5 quarts. The FL910 is also listed for the truck, but it's a smaller filter. It will work, but I prefer the larger filter area of the FL400S. Don't go with anything less than the Motorcraft Semi-Syn 5w20. I personally prefer Royal Purple, but still change the oil every 5000 miles. Oh, and please use the Motorcraft filter. Oil changes and filters are not a place to skimp if you plan on keeping this truck.

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