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I'm a bit confused about what octane fuel the above car needs?
Model is a TA-BP5 and as far as I can tell a 2L EJ204 engine. Possibly overthinking it but, the online 2004 owners manual makes mention of 87RKI being appropriate which I think converts to 91, but then I saw somewhere else that most older Subaru's need 95...
It is recommended that any turbo Subaru runs on a minimum of 95 octane fuel.