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      06-20-2021, 06:13 PM   #4
ODX7
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Drives: 2014 435i M-Sport
Join Date: Feb 2019
Location: Mississauga, Ontario

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I wouldn't recommend using Costco 91. I use to run Shell 91 and when I went Stage 1 91 Octane I started experiencing some knock which stopped when I switched over to Petro 94
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