I am approaching 1500 miles on my 2014 2.0TD and am averaging 32.3mpg despite driving like a grandma. I am a salesman in Chicago where constant traffic has limited my average mph at fuel up to between 22.5-25mph despite daily 40 mile one way drives. Also, I run my tires at 42 psi cold. Can I expect my fuel economy to improve as the engine breaks in at similar usage? Will a tune help and are there other tips for improvement?