RD80770 3800 from HD Oil Type?

[Xmech]

The PDF says change the oil after the first 20 hr break-in so i'm looking for opinions on what lube is best suited for the Honda engine, Synthetic for long hot summer days maybe? idk :happydance:

[smallen]

10w-30hd oil, its on pg 9 & 12 of your owners manual, it also in the honda engine owners manual
you can use sae-30hd in your area in the summer months