well on the weekend my 2018 3.5 Eco started to do the 3-5 second cold start rattle in addition to being noisier than normal for the last 3 months. On the last oil change they said that yes it starts up a bit rough but that it was still within Ford spec.
Today Ford service told me that I need to let it get worse before I bring it for its 2nd set of cam phasers, timing chain and whatever else they replaced last time. Guess it must rattle for more than 5 seconds to warrant repairs lol
Of course with COVID they are currently not offering shuttle service or vehicle rentals so you must arrange your own ride which sucks as last time they had the truck for a week