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So long as it is CK-4 rated by API, and rated by Ford for the 6.7 diesel, your pretty safe. Either Motorcraft semisynthetic, or full synthetic, or any of the rated API full synthetics would be ya our best bets. There is a topic on the Ford spec for these oils, be sure yours is on there.
Many are saying don't change the oil until 5000 miles, atleast before going to synthetic. A little controversy on this topic so you can read up and make decisions on your truck from there.
I use Mobil 1 5W40 Full Synthetic meeting the CJ4 standard. No complaints so far. I switched to it at 10,000 miles. I used motorcraft oil for the first 5000 mile change.
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
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