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Thanks Guys. I live in Michigan's Upper Peninsula. To date I've found one station that sells 93 octane, so they say. Tried 91 octane at another station with no change. Also an octane booster. Ambient temp. not an issue. Hills? I wish we had real hills and curves around these parts. Just...

Hi All. Picked up a 2024 Z Sport last month. First "Sport car" in my life but rode motorcycles for years with plenty of zip. My issue is this. The dealer filled the tank with I assume the proper octane gas. No clue what brand. For the second tank fill I used 93 octane from a busy station...