Ah but it is. I was getting 1000 km. out of a tank of diesel when I was in France. The economy more than makes up for any price differential. Bill In a message dated 28/08/2008 7:02:31 P.M. Pacific Daylight Time, max_heim at sbcglobal.net writes: Yeah, but diesel costs more than premium, so it wouldn't exactly be an economy measure...