Idemitsu IFG3 5W-30 SP/GF-6A Motor Oil

I used it for about the first four years that i had my cx5. But it became a little too expensive & hard to find. Now i just get Pennzoil Ultra Platinum from Walmart. I don't notice any difference in performance, but I am not as "in tune" with my car as others.
 
Use it, don't use it, but honestly, do what E_N (sort of) says and grab a jug of whatever synthetic oil you want from Walmart.

I usually get Pennzoil Ultra Platinum, Valvoline Advanced Synthetic or Mobil 1.

Just change it regularly (~5k miles) and you'll be fine. Don't overthink it.
 
Back