motorcycle oils

Hi, I have a 2018 Yamaha Eluder motorcycle. Yamaha calls for a range of viscosity of Yamalube mineral oil. I inadvertently put in 15W-50 full synthetic. Yamaha calls for changing oil/filter every 4,000 miles. I do that religiously. I am wondering for both availability and cost, what risk do I...

Hello Guys! I just wanna ask if this oil is good for a wet clutch bike. I'm not knowledgeable when it comes to seeing the data numbers so maybe you could help me out. I live in Asia and we don't have the Rotella T4/T6 in which some on you mentioned it's a good oil. Maybe this is a good...

Hello, I want to ask about motorcycle oils that confused me about the grade of it. The first one is Motul 7100 10W40 and second one is Ipone Katana 10W40. Both of them are Ester based oils and the price are pretty much the same only about 1-2 dollars difference. The country I'm living is...