From 2 of the best Honda tech's / Service managers I know.

First 600 mile change use Non Synthetic Honda 10/40
After 3000 miles change to Honda HP4 Synthetic Blend (Gold Bottles)
Change every 3000.

One of them has a 919 with 80,000 miles on it always ran HP4.

Opinions are one things 80,000 trouble free miles is another.