I think mines considered a 1.5. Yeah supermarket fuel is not to best but not auwful never had any trouble with it myself. I fill up at shell every now and again and notice an extra 30/50 miles per tank with careful driving.
Perhaps I should start using better fuel and see how it goes.
I got in to a habit of using super market fuel mainly becuase its all thats local to me bar one shell which charge silly money currently about 139.9 for a litre of unleaded and sainsburys 5 minutes away is 133.9, but if I pass a more reasonable shell I'll fill it right up I think and see how it performs.
It crackers isn't it what these things drink! I don;t even sit there with air con on or boot it anywhere, I drive with a light right foot and get auwful returns. When I entered the world of ford I thought I might be on to a money saving path lol so far have spent a small fortune. That said touch wood its never let me down like every other car I have had bar the mk4 golf which was good. It was only a 1.6 petrol but a tank got me 440 miles with careful driving! BUT it had so many niggly faults I had to dedicate half my life to fixing it lol. I'm enjoying the fact I just get in turn key and of you go