I am thinking about taking the plunge tomorrow by buying a 1.6 zetec s 56 plate petrol. I currently do a 90 mile commute, all pretty much on motorway. I know with the high mileage I should be sensible and get a diesel but I am tempted to buy the petrol to have something a little more fun to drive. Before making the final decision I was wondering if anyone who has one or has had one and done a lengthy commute wouldn't mind helping me out in giving me a rough idea of how much it would cost in fuel. Especially a comparison with the diesel version would be hugely helpful. I know it depends on the driving style but lets say it sits at 70 all the way.