If these are the specs it would seem it's best run with premium fuel. Ours seems to run fine with regular.
FB20D (DI): Impreza 2017+, Crosstrek 2018+
Compression: 12.5:1
Power 152 hp at 6,000 RPM
Torque: 145 lbf⋅ft at 4,000 RPM
FB20D (DI): Impreza 2017+, Crosstrek 2018+
Compression: 12.5:1
Power 152 hp at 6,000 RPM
Torque: 145 lbf⋅ft at 4,000 RPM