Thanks for the input and redirection Pauljo. The string talks more about the use of synthetics, I am more interested in a discussion about standard oils. For instance, the manual recommends the use of a 10w40 oil rated SF or SG in both the engine and trans; the standard 10w40's you get in places like Wal-Mart or AutoZone are not rated SF or SG. My suggestion is a thread to discuss what 'standard' oils owners are using in lieu of the suzuki brand stuff. I think this info would be a big help to all 650 and 400 owners.
I know we may have discussed this somewhat in other threads, but it might be helpful to everyone to have a centralized thread on the topic. Myabe we should move th the tread to the General Discussion area.