I'm in Canada and octane 93 is not readily available in my province. Our super unleaded is mostly 91 Octane. Will running on 91 harm the stock 2.4L motor? Subaru recommends 93 Octane AKI.
It won’t be harmful,if you want better performance you could buy an octane booster from a car part shop it’s specifically tuned for 93 but the octane is high enough to not be a problem
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