Always use the highest octane available with forced induction (turbo in this case).
Is this your first vehicle with forced induction? You don't need to do anything to transition. Just fill er up!
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Past: E36 325i, E39 540i, F46 323i (AA tuned), E82 3.0NA, E84/F30 N20 BMS Stage 1, E70 X5 N55, F06 N55
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