Wow. I complain about paying $715 per year for two vehicles - my 06 Canyon and my wife's 10 Focus. Full coverage on both.
Summer 2015 was slightly warmer than the previous summer. The vacuum gauge plus wheel covers helped increase summer 2015 mileage to 38.5 MPG. Winter 2015-2016 was warmer than normal, so average mileage only dropped to 31.75 MPG.