I am curious about octane related to this. I am an accountant not an expert lol.

Octane for mogas will decline over time. Bryan at CPS has done a couple of accident investigations recently where "old" gas was determined to be the cause of the accident. I think at least one of these was in TX. He mentioned not running any mogas that had been sitting longer than 30 days. I know of a tank of mogas on a field near me that gets filled about every 6 months. They said "we have never had a problem".

As I understand, 100LL will maintain its octane. Will Swift?

Any thoughts on all of this? I guess not a problem if flying all the time, the mogas could never get stale.