In my experience as a diesel owner of several cars over the last 25 years - mpg numbers (city and hwy) usually go up as the engine breaks in (I'm sure many on here have experienced this too). Some engines (thinking about you Isuzu) increased as much as 20% more after break-in...
I think these numbers are great as a starting number. My mother-in-law is picking up her 28d next week at the welcome center and I'm looking forward to seeing how it drives/rides!
