Dzienki Paul89R1!

I ran the factory Yamalube mineral oil for the first 8.500 km on my bike (1.000 km change done by the dealer). I've now switched to full synthetic AmsOil 10w40 and their oil filter. When I did the oil change I had an oil analysis done on the Yamalube mineral oil, they said the oil looked fine and could be run till 10.000 km without any issues (the U.S. manual has different oil change intervals than EU). As long as you get a decent oil with a food additives package you should be good to go.