Thyanks for posting this FF.
This oil may be actually lighter than a 20wt as the Japanese OEMs are do FF with lighter oils such as 0W-10 that are available in Japan.
I presume the Toyota 0W-20 is the recommended service fill for the Scion FR-S? For the Subaru BRZ, I'd use the Toyota 0W-20 over the Idemitsu made Subaru SN 0W-20. If you want to continue to use the high moly oil like the FF, the Idemitsu SM 0W-20 supplied to Mazda and Mitsubishi still can a high moly level unlike the Subaru oil.
BTW, nice ride.