Petroleum-Benzine mixture o.O.

Hello, I have seen a video where at least the engine of a lawnmower ran on pure (!) kerosene. Kerosene is basically kerosene without certain additives. So far so good. Unfortunately there is nothing about the octane number of kerosene in the net. Does not need a turbine either. My Astra F has driven with a diesel petrol mixture and that without any problems. (Only in absolute cold run still a bit at the stall) There is no information about the exact mixture. The engine has a compression of 10.0:1 and can tolerate even 91 octan officially. Furthermore, petroleum is very degreasing and should condense on the cylinder wall at cold engine temperatures and influence the lubricating film. My questions about petroleum: -100% is out of the question, because of other calorific value, strongly degreasing and hardly knock-resistant (only unknown, how much) -80% Petroleum/20% Petrol hardly becomes an Unt -50% Petroleum/50% Petrol – how could it behave at operating temperature and full speed? -30% Petroleum/70% Petrol – better? Please no comments like “Puff explosion ready” or too pessimistic and optimistic comments. I know it would run without any problems with little load. I just don’t plan to sacrifice an engine for it right away to find out what happened at Vollast. Anyway, he survived the diesel fantastically without measurable wear – was but only one full tank! Has anyone ever had any experience with it?