When to switch to synthetic
I switched at the first oil change(1,000 miles) and the dealer did the switch as the first oil change was on them. They did not indicate that it would be an issue. My bike is a 09, so maybe the newer bikes would be different. You could look at your owners manual to see if it states what should be done. There are many on here that are more knowledgeable than I and do engines for a living, so I am sure others will speak up.
2018 FLTRXS, Vivid Black, KW Slicer Front Fender, Sundowner Seat/Modified by Mean City Cycle