I whole heartedly agree with Dad. So I will only have one more comment. It is true one could do a search and in a few hours time weed out the pertinant information, most of the weeding posts such as yours, or, ask a question and those that fit the criteria take the 30 seconds to answer and your done.
Now I ask, next time you talk to Dad ask him, what would be the wisest course?
Hello, I am using valvoline 10w-40 full synthetic but considering going to Mobil 1 synthetic. I have no issues and bike shifts great. 10w-40 is easiest to find and is still a 40 weight oil. I spoke with local dealer service manager and he said this is the oil a lot of owners use and it will be fine to use in the Vic. I have the 106/6 by the way.