it is a honda,
leave the factory fill in for till your OLM is at 50%.
if you want to know, pls use google to search for honda break in oil, factory fill yada yada.
I feed fit any synthetic on sale, the sump is huge, so you will benefit from Amsoil, not sure of your driving skills, but my previous honda's suffered from fuel dilution, so I could go the length when using syn.
I do a oil only change at 5 or 6 miles and then a oil and filter at 12k miles, fyi the olm still has 15% left most of the time.