I have a coworker who is picking up a new F150 with the 5.0 soon and I’ve been talking to him about the break-in procedure. I received advice from a tribologist to switch to Valvoline Max life synthetic blend 5w-30 after he dumps the factory at 500 miles and run the blend for 1k miles before going full synthetic at 1500 miles. I was originally going to recommend M1 5w-40 at the 500 mile OCI. Thoughts?
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