aplusgeek

So just an update and fyi. Towards the end of the fuel that came from the dealer I would hear a sporadic engine knock. When I consequently filled up with premium the smoothness returned and it's been smooth sailing since. So the dealer probably filled up 87 octane. At 91 octane the car runs smoothly and quietly, I am putting on approximately 1000km a week right now. And I love being able to drive almost 1000km with a single tank :) , in my previous car (Jeep wrangler) that was 3 fill ups - i.e. $200

Oh that's pretty good. Yeah I can't get away with that, I put about 150km on mine daily.

You're right I think I may have looked at the regular fusion manual that was included. What do you mean when the engine starts? Are you having engine issues?

Hello everyone, I've read a few topics here and most people seem to be recommending regular gasoline for the fusion. However, in my manual it states that premium (91 octane) is preferred to get max mpg and performance? What does everyone here recommend? I drive 2017 Ford Fusion Energi Thanks