I don't really care . I just assumed you knew where the record could be found. If you google Rotax rick, the guru of Rotax, he reckons the 618 is the best of the 2 strokes if looked after correctly. He recommends running 40 to 1 . None of his rebuilds have failed and he thinks 40 to 1 is the main reason. I have oil injection but I need to add a bit of oil to the fuel too I suppose.
I was terrified my Jabiru engine would explode but it ran like a Swiss watch. Read to many internet posts about how bad they were.