It is all about how you drive. I got into the habit of filling up every time I go into town but here is yesterdays small trip to pick up my GF. It was about 5% city driving. Highway had some light traffic but I was going around 65-75mph. It’s not flat land not nothing like going through mountains. Just small inclines.Are you serious with that fuel economy?! That's unreal! I'm lucky to have 15, and I have the same engine / differential. You're in ecoDiesel territory.