[HRWatson68]

From the Manual...

FUEL RECOMMENDATION
Use unleaded regular gasoline with an octane
rating of at least 87 AKI (Anti-Knock Index)
number (Research octane number 91).

Wouldn't this mean that in the US the mid grade fuel of 91 Octane would be what Nissan recommends?

 

[HRWatson68]

I need to check the pump more closely next time, because I am sure I've seen research octane numbers, and not AKI.

I'll report back after I see the pump.