Ok so i had a long conversation with Inmotion about optimal tuning for an NA 850, and he said that i should not be running 87 octane in my car, and that the minimum is 91. He said that this is specified in the owners manual and the inside of the gas door. Is this true? I know most of the turbo guys run 91+ but for an NA too? I put this in performance as he said that after i get my ECU back i HAVE to run 91 minimum