02-05-16, 05:31 PM
I've had no particular reason to differ from the manufacturers recommend semi synthetic. I do make it a habit of changing the oil at least every 4k and of fitting a new OEM filter at the same time. Out of interest I checked what oil the rider of the 200k Gen1 used and it seemed she favoured Mobil 1 synthetic so that may be an endorsement of sorts but again she changed the oil every 4k so it could just as much be down to frequent regular changes. I don't think you'll get a concensus of opinion on this subject wherever you ask, you may as well flip a coin.