Who's using FULL synthetic oil in their street bike?

[AllanB]

Oil is oil. Just be wary if engine oil does clutch as well . faaark all the internet experts

All good - I have only ever used Motorcycle only oils in my bikes - avoids any clutch issues.

The motorcycle/car oil debate - I'd rather stay clear of that one!!!!!!

[Moki]

I always try to use at least one grade above the manufacturer's recommended. Doesn't matter if it's synth or dino, however syth will mean you're paying extra...errr..... throwing money away. The GS is happily on 80K km+ with religious 5k changes