[Jesse]

I am somewhat confused as to the meaning of city vs highway miles. My normal commute to work is 52 miles one direction. I drive on the highway for 49 of those miles. Here is where my question comes in.

For the first part of my commute I drive 3 miles pure "city". It involves 5 stops and speeds under 35mph. The next 12 miles is 60-65mph speed limits with 5-6 stops(depending on lights). From my understanding those twelve miles aren't exactly city or highway. I am going highway speeds, but stopping at stoplights fairly frequently. Would those still be defined as city or highway miles?

Would altering my route to roads with less stops help my mileage much?
If I encounter NO rush hour traffic, no engine warm up, I can achieve 40mpg for the duration of the tank even while cruising at speeds over 65mph. Depending on congestion I drop to 38, sometimes 36mpg. Thanks!