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I know that the Subaru owner's manual says that "If unleaded gasoline with an octane rating of 93 AKI (98 RON) is not available, unleaded gasoline with an octane rating of 91 AKI (95 RON) may be used with no detriment to engine durability or driveability."
BUT...........
Subaru Canada website say that the recommended MINIMUM octane (AKI) (*required octane) is 93..... so perhaps the 91 Octane is pushing the limits a bit?
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