Sorry if this has been discussed but I searched and couldn't really find anything on this forum pertaining to my year make model issue etc. I bought a 2016 Jeep Limited 4WD in October. My gas mileage is so bad I thought I was stuck in 4 wheel. (I'm not). I do "city" driving (by city I mean suburbs so it's not as bad as the stop and go of the city but it's not highway) and my BEST tank average was 19.5. My worst was 17. Now it's just getting worse. I had been using the remote start and letting it idle to warm up for a good 10 minutes in the morning ( I live in the northeast- it's cold) so I stopped doing that for the last 2 tanks to see if it improved- it has only improved slightly. I have 3800 miles on the car. What could be causing such poor gas mileage?