The CX-9 The car gets an estimated 15 mpg in the city and 21 mpg on the highway. Good or bad for an SUV type? You decide. I reckoned it would be a great commuter car, if I were hauling seven people every time I took it out. The estimated fuel costs: $2,470 per year based on 15,000 miles per year at $2.80 per gallon. But fuel costs would be more like $4,000 per year. Divide that by seven non-family members and maybe.