Just found this thread and I also went from 87 to 93 to see how performance would change. I gradually added two or three tanks of the next octane over the last few weeks. Now I also have a check engine. Here's what Ford Pass is saying.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.