I've always been under the impression to NOT change the oil before the regular oil change interval during break-in. In otherwords, if the manual says to change the oil every 5,000 miles... then wait that long before changing the oil... ESPECIALLY during break-in, since engine parts continue to break-in even up to 10,000 miles. If you put new oil in the engine, you may not allow the valves to "seal" correctly, causing the engine to burn oil.
This has always been my impression.
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