This horse has been beaten to death more times than I can remember. Having said that, people a lot smarter than me, including some engine builders with impressive credentials, well respected Bitog members etc, are still suggesting dumping the factory fill early. Others will tell you it's harmless, and to leave it the full OCI. I have been dumping the FF early since the first new vehicle I bought several decades ago, and will continue. Just one look at a UOA from a new vehicle tells me there's a lot of break in metal in the oil that {I'd} rather not have in the system for a full OCI. Opinions vary, that's mine. OP do what you feel is best.