How many miles per gallon do you get out of a Mazda 6?

Mazda 6 3.0L V6 with 5 speed manual First, the mileage will differ in Summer vs. Winter. From my experience, expect the mileage to differ by from 2-3 mpg. Second, it will differ depending on how you drive. I drive gently, using the full "hammer down" sparingly. In Winter, expect 24-25 mpg. In Summer, 26-28 mpg. This is a mixture of city stop and go and interstate driving. A steady state, 65 mph in Summer will generate 30 mpg.