all the truck station should have diesel

Tried once at a truck station for diesel and I found it seems to be even better. Check out bimmerfest forum http://www.bimmerfest.com/forums/forumdisplay.php?f=159 and search for diesel. You'll find out more info on what type might be better. They are saying biodiesel is not good unless you don't plan to keep after 4 years.

There is a website which shows all the diesel stations in your area. Google it.