I haven't claimed a numeric improvement. All I've posted are raw tank numbers.
(R+M)/2 means R and M are represented in equal parts. What do you mean by MON sided rating?
Assuming the fuel is at least 87 octane, BTU content is going to have a greater impact on fuel economy than octane.
Because there are all these factors adding noise to our results, collecting useful information is going to take months. I'm not going to list every traffic jam and thunderstorm I drive through.
You're welcome to try this on your car and post the data in any form you see fit.