The Rotax 912's oil level as measured at the dip stick seems to vary quite a bit -- the measured oil level is dependent upon several factors (e.g., oil temperature, manner of burping, time elapsed, etc.). Before you get too concerned about your overall oil consumption, operate the engine for many hours and see how the consumption averages out. Also, the 912s are known as tight/leak-free engines -- IMHO, you should have absolutely no external oil leakage. You might see a trace of oil misting on the belly over time -- usually from the oil tank breather and/or fuel pump bearing vent.