Quote:
Originally Posted by nosnoop
Do the service and maintenance intervals differ between diesel and petrol?
And does diesel have more problem in extreme cold weather than petrol?
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I owned the diesel X5 for a winter in Minnesota. They are fine as long as they are stored in a garage or slightly warm place. If they are parked outside the DEF warnings will appear in very cold weather since the larger tank isn't heated (my SA had customers with this issue). Otherwise I had no issues with the diesel and mine was garaged, so the DEF issue wasn't a concern.
+1 with JCLs explanation. I have a 2011 3.5i now and will post gas mileage results soon. In general the penalty is around 10% overall to go with the 3.5i.