For what its worth, it's drawing a long bow to recommend an oil and saying it's been fine since I have been using it. Why not go directly to the horses mouth and use the recommended oil from a manufacturer like Castrol, the link below will take you there. I would imagine other manufacturers have similar sites. After all guys they make it, test and guarantee it! http://datateck.com.au/lube/castr_au/ Castrol Edge 5W-30W for Aurion GSV40 and GSV50R