You don't need 93 octane. Where on earth did you get that idea?
I love Cub Cadet tractors..... but I'd rather mow with a ZTR. Way more efficient. Especially if I had 4.5 acres to cut, which is a ridiculous amount. I'd keep the 1811 for chore work. Get some other attachments for it....but I would get a ZTR. Or maybe in your case a 12' batwing finish mower, lol.
