yamalube

Time for a service and this time I will do it myself as the price is too steep at the shop. Wondering what oil people are using, feel this Yamalube semi synth is going bad a bit fast (feel it when shifting).

Hi guys, im due for my first 1000km or 600 miles servicing. I was hoping to get some advice if I should be using yamalube for the engine oil. It feels weird over here with our dealer. Warranty for 6 months excluding wear and tear. But if you went back regularly for servicing, they will extend...