Using premium fuel works for whatever reason: http://www.fordfusionforum.com/topic/10692-switching-6f35-for-f21-aisin/
Originally Posted By: W_John_C
How exactly would raising octane levels fix my transmission concerns? There are many misconceptions about premium fuel. I am genuinely interested in hearing this theory if it's based anywhere in reality. I am aware that this PCM is capable of handing multiple fuel tables, obviously because its a flex fuel power train, but premium fuel by itself isn't high enough octane to trigger that fuel table to advance timings and cause any notable drivability improvement.