2.5L Engine Break In Period?

Correct. Once these metal wear rates level off, that means your engine is fully 100% finished the break in process and this is ideally when you want to do your first oil change to get the metal shavings out of your oil filter.

That may not be true in all circumstances.

Over on the VW TDI community, it is known that it can take the TDI engine 10's of thousands of miles to fully break in. I would say 95% of the engine is broken in by your first scheduled oil change.
 
I agree with GJ-molester on this. While 600 miles is probably the miles at which it is difficult to do any damage, UOAs suggest that it takes ~ 4-5,000 miles for the wear values for Iron, Aluminum and Copper to level off. Ed

Over compensating in my opinion. If this was actually the case then Mazda would recommend this considering all the litigation they would be open to if they didn't due to the engines not coping.
 
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