Reading the odometer is often seen as the best way in gauging the health of a vehicle. Unfortunately, just looking at the numbers may not always be helpful, and there are many reasons for that. One of the most important reasons looking the odometer may not always helpful is that there is a difference between city mpg and highway miles per gallon. Driving on Highways vs. Driving in the City    When you drive on the highway, there are fewer obstacles when compared to driving in the city. You don’t need to change gears often, and you can put your vehicle on cruise control. Cruise control allows your vehicle to maintain a regular pace. When driving in the city, there are