Hello, As the mornings have slowly started getting colder, here in Michigan, I have had some intermittent issues with hard starting on my 2008 X5 4.8L It will crank for an extended amount of time and then stall. When I try to restart it it will crank for an even longer amount of time. After a few tries it ail start. This happens consistently during cool mornings. Yesterday, for the first time, it happen in th evening (after I left the car outside and I was at a business dinner). I told the dealer and he thinks it is bad fuel. I have run my tank down to 'E' and have changed fueling stations with no effect. Any suggestions would be appreciated.