I bought a 2020 Nissan Kicks SR. I noticed pretty quickly that the little 1.6 liter motor struggled a bit getting up to speed. And passing on the interstate. So I first tried Shell 89 octane. I Immediately Noticed it was much peppier. And transmission was also smoother. Then for the heck of it. I tried 90 octane ethanol free gas in it. Wow, even better! Is the ecm mapped to be able to advance timing and other adjustments to make it better for the higher octane? One of the reasons I tried 89 octane. Was in the owner's manual it stated to use an octane of at least 87. I would much appreciate your thoughts on this. Thank you..