Blurrg - have used Kirkland Synthetic in the CR-V only once (currently in engine), because I just bought this oil a month ago (CR-V has just over 1500 miles since that oil change).
However, have never observed a-n-y difference in performance or mpg, between any of the oils (same viscosity, different makers).
I have used synthetic motor oils exclusively (well, almost) since mid-80's.
CR-V - Oil filter/changes every 7500 miles like clockwork, well before Maintenance reminder has ever approached 15%.
Trans is drained & refilled every 5th oil change. Rear diff is changed once a year.
180k miles and still running very strong (but too light duty for our future wants/needs).