I'm too new at looking after a bike to have any practical experience with wrecking a clutch, but everyone I've spoken to and every article I've read says as long as it does NOT have a sticker saying it has "friction modifiers" or is "energy conserving", then it will not wreck anything.As far as I can tell folks the majority of the folks are saying Shell oil, but use Rotella-T 10-40 (or 15-40) diesel engine oil. I've got a gallon of it in my garage that I'm thinking of doing an oil change with after another 1800 miles. I think the last oil change from the previous owner of my bike used regular 4 stroke motorcycle oil. I'm going to top it off with the extra bottle of 10w-40 4-stroke motorcycle oil I've got. Should I worry about doing this?
Apparently, there are 4-stroke motorcycle oils for bikes with dry clutches. If the quart you have is this type and if it has any of those stickers then I wouldn't use it without checking into it.
I also read somewhere that any oils which are paraffin-based should NOT be used. Anybody know about that?