Managed to get 405 miles out a full tank (45 litre fill up) in my 2.2 in a journey from London to Warrington with Cruise Control set to 75mph (but had some fun on the M6-toll road on the way up and back down)

I usually use shell v-power or BP ultimate... but my local BP had run out of ultimate so I just used normal unleaded.

Quite good for a car thats done 110k miles....