May I say something very stupid?
I am doing it all the time so why not once more
Isn't the fuel story just marketing?
I once (years ago) read the Mercedes materials surrounding their engine and how they developed it. They stated they design it all in house and the whole concept is thought of and engineered by a team. That included the fuels and the lubricants. If they make an improvement to the ICE then all aspects are involved. I do believe it straight away that if you can have a fuel that (even if just slightly) can prevent (make margins of unpredictability smaller) any premature exploding of the mixture that really helps total power output. But it sounds also totally logical that the same team that design the combustion process also tailors the fuel to need. So the MERC AMG engine team, not anybody in Malaysia at Petronas. They just pay an (enormous) amount to be sponsor and then every once in a while Mercedes communicates that thanks to the good guys at Petronas we can now have x HP more, great fuels by a great company, thank you! so much!
Now, don't all engine builders do the same? Ferrari with Shell, RBR/Honda with Esso Mobil and Renault with BP (and Castrol for lubricants).
So isn't this whole "bringing new fuel" actually a marketing story, it is just the team of engineers who developed a total concept that should allow X number of HP and it is just a decision/dare to use it close to the limit. of course the fuel is part of it but it is not like Esso engineers have been developing that somewhere in (where are they even?) their research department but just by the HRD team in Sakura. Perhaps assisted by, if those fuel companies actually have those kind of engineers?
If the engine blows it is Honda who suffers. So it will be Honda who needs to oversee.