The Owner's Manual states the first service be performed at 300 KM (~ 186.4 Miles). Is that correct? Not 300 Miles?
In any case, I performed the service @ 209.7 Miles. Used 10W40 Full Synthetic, and poured about 0.85 liters. Why doesn't the engine use a proper oil filter? Instead, it uses some thimble-like mesh contraption. The Gear oil was an easy change if you a little squirt tool around (or buy some kind of eye drop or baby syringe from the local pharmacy)
The engine is definitely smoother - during dle, hard acceleration, and at full throttle. Hard to say if there's an improvement on its acceleration... will do the valves some time soon.