I was historically using dino oil (non synth or combined) on my first VFR, on '01. I called someone, I cannot remember exactly who, that I considered an expert and was told I could switch from dino to synth and back at will. No harm done.
On the 8,000 mi oil change interval subject, that same '01 got irregular oil changes at 5,000 to 8,000 mi with one at ~10,000. When she was KIA at 105,000 mi. I had taken a sample of her last oil change and post crash sent it to Blackstone Labs to have the oil analysed. That oil had about 4500 mi. on it. The analysis report (in my gallery) said the oil has slightly more metals than their standard measurement oil which was 2,900 mi. The difference they attributed to the extra miles on my oil compared to the standard 2900 mi. oil. They concluded that given the high mileage on my bike, the sample was better than average implying my oil change routine was fine. The comments concluded "Nice bike!"
YMMV.
Hope this helps Dutchy.
BTW: your new machine is fabulous.