The BRZ manual for oil changes specifies on pg. 412
"Engine oil selection
Always use SUBARU approved engine oil. For details, we recom-mend that you contact your SUBARU dealer.
If approved engine oil is unavailable, another motor oil of matchingquality can also be used.
Oil grade: ILSAC multigrade engine oil
Recommended viscosity: SAE 0W-20"
What brand of oil will you be running?
Also, synthetic blend, full synthetic or conventional motor oil?
When will you do your first oil change?