I just started a strip down and service on the Kinlon KBR200 and felt that a replacement of oil might as well be done again while I am at it now it is at 750 km, having done a 300 and 500 km changeover for running in. The oil I was advised to use has so far been a synthetic Motul 4T 10/40 but heck that stuff is nearly $100 for four litres so I have changed, on the salesman's advice, to a mineral oil, Shell Advanced (synth additive) SX4 15/50 at half the price. Given that this engine/clutch is pretty basic 4 stroke and that I don't hammer through the bush, rather I crawl along the dirt tracks to home and cruise the asphalt, will this oil be OK? How often should I change now?