MD Mondeo Ecoboost Petrol - Fuel type

[evanlau]

Hi all,

I know the MD Mondeo Ecoboost is 'optimised' for U95, but officially can take U91 but with 'potentially' lower performance or fuel efficiency. I'm not interested in philosophical or theoretical debates on this, but rather on real world experience of those who have run on U91 for a good period of time/distance. What's your feedback on efficiency, noise/smoothness, long-term impacts, etc.?