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Soo, a local parts store has some signature 0w-20 Amsoil. Anyone has oil specs that Subaru wants or can explain to me what "ilsac multigrade" means?
Scion service manual is a lot clearer: API grade SL "energy-conserving", SM "energy-conserving", SN "resource conserving". Hence, Amsoil signature should work for FR-S but would it would be nice to have some confirmation from Subaru's own source.
Anyone with HTML service manual access?
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