REPORT.30000km after engine rebuild + oil change

All the time i bought 4l of Dexelia oil.
During 9000km i do not added any oil.
But i think that oil level changed a little, but i think these small grams burns inside of engine, because my driving style is quite active.
So i`m fully satisfied, because really, i drove on autobahn many time till 200km/h, i drove time attack on tracks sometimes and etc.
Cool!