Dear toddbbot,
I am assuming you called or are sure you are adding in the specified RON95 as that in the international standard. I wasn't so sure, so I called.
I am not sure the experience you have with other cars, but based on the May issue of Performance BMW Magazine the dyno pulled 341 hp (<-- memory ) out of stock M135i. I am sure the gasoline supplier in your region should provide something similar in fuel quality as RON 95.
