I put the first 75 miles on my '05 600 SDI and I got just 10.8 mpg! I would have put on more miles, but it was on "E" after just 60 miles, so we turned around and we went back to the trailer! That's a long ways from the 18-20 mpg I was expecting from this engine. Is it just the break in that I will see this? What has everyone else been seeing for mileage?