Lol.
No, no, no!
Petrol only bro, not even 10% ethanol.
Reason being, parts of the carbs in these machines are made of plastic and diaphragms made of rubber. Ethanol reacts badly with these components, causing in the case of the plastic, warping. This in turn breaks seals, and will cause the machine to not run properly. Classic case is the Briggs sprint motors. Warps the plastic carb on top of the tank, causes an air leak that in turn makes the machine run rich, and foul.
Tally so far, ive fixed 4 neighbours and friends mowers from this problem.