I think i've got close to the 750 miles mark but that was majority motorway at 70 with cruise control. Mostly get around the 550-600 miles on a tank but thats being sensible
I've never got more than 500 from a full tank of diesel (running down the side of car when filling). Until I put a genuine Bosch diesel filter in I was getting 450 miles to a tank.
How do people get so much driving out of their tanks? I Don't drive around towns and it is an hours commute to work on country roads?!
I picked up my new six speed diesel at the weekend. Filled the tank Sunday evening, and the computer said the range was 500 miles. I've since done 70 miles, about half on the motorway, the rest around town. The fuel gauge is still on full, and the computer now says I have a range of 580 miles.