Hi, Im still relativity new to the 'BMW Club' having brought a 318i saloon 6 months ago as our family car. After a holiday in it, and 2 small children me and the mrs decided we could do with something slightly bigger, so i started looking at 3 and 5 series tourers...but the occasional 7 series popped up in our price range. I have found a 54 plate 728i with 20k genuine miles for £5k...i instantly phoned it up and its an older mans who had it as a second car because he could. Now me and the mrs really like it, but as its an absolute tank how much is it going to cost to run, we do between 7-10k miles a year. My 318 gets me around 375 miles to a tank (£70) around town but is pretty good on a run (around 450). But i also have to take into higher servicing costs on a larger car? and tyre prices. Any help and advice would be great
