Good evening all. We traded our 2.0T Santa Fe in for the long wheel base Sante Fe 3.3L GDI V6 last Saturday. Couple of questions... I am fairly old school when it comes to OCIs. I plan on doing a 4k OCI with this engine. Would QSAD be a decent choice for this DI engine? Or should I go with a synthetic? Also, I have typically dumped the original factory fill at around 1,000 miles. The dealer service rep advised this was not necessary as the factory fill has "break-in additives" and I should run it until at least 4k miles. Any thoughts? Are OEMs adding mystery additives at the factory? Thanks in advanced.