I use Shell Vpower which is 91 octane in Canada and does not contain ethanol.
BMW recommends premium, that's what I use.
I think you should search the topic as this has been discussed many times.
I just don't understand why someone would pay to drive a premium car but would consider cheaping out to save a few bucks per tank
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2018 540d xDrive Carbon Black Metallic on Cognac leather. Spec'd out to the max
2017 Mercedes C43 AMG Coupe. Black on black
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