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I think you'll be fine with 89. Listen for knocking. Our Porsche Macan S requires 93 and even dealer told us we can use 91. We have not noticed any
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05-20-2021, 11:49 AM
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Track Member
Join Date: Jan 2017
Location: Vancouver, BC
Posts: 806
Drives: 17' 370Z Nismo
Rep Power: 40657   |
I think you'll be fine with 89. Listen for knocking.
Our Porsche Macan S requires 93 and even dealer told us we can use 91. We have not noticed any issues using 91. Maybe timing is adjusted by ECM and we don't notice, but no lag, or power loss noticed. She's a Banshee.  Certainly no pinging.
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