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Shell 91 (no ethanol) is better gasoline than any of the nationwide 94's which all use ethanol to achieve their octane level. There's a reason a lot of the GTR owners in Vancouver drive to Washington to fill their cars with US Chevron 92 (no ethanol) over Canadian Chevron 94. The only time our 94 is better is if you get the car pro-tuned for that gasoline.
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