I'm currently using Castrol GPX in mine. Its a semi synthetic oil with a 10w 50 viscosity so it has wide temp range. Best thing is its $36 for 4 litres. I change every 3000ks though.
A few of the guys here are running the Q8 full synthetic as its a good oil and the Q8 distibutor looks after us with discounts.
As your not too far from Narelan Kawasaki, drop in there as Richard will give you a good deal on the Q8..
BTW, Welcome and nice bike..
