this is called the break in period.
any debri or assemble lube will be removed after your 1st oil change.
please follow manufacturer suggestions or you could void your warranty.
use quality oil to keep your expensive car running like new and smooth. quality oil can also extend the life span of your engine.
1. proper oil viscostiy (follow car owners manual)
2. quality oil like synthetic
3. look for high TBN (Total Base Number) in oil specification.