2009 Mazda 6 i Grand Touring: Fuel Economy in the Mountains
July 14, 2009
On our three-day trip to the San Bernardino Mountains, we averaged 24.5 mpg over almost 300 miles of driving (about half of which were on flat highway). That's slightly better than both our lifetime average with the car (23.5) and the EPA's combined fuel economy estimate (24). But considering that the EPA highway estimate is 30 mpg (and our best tank so far has been 29.5), the mountains took a good chunk out of our fuel economy, which is what you'd expect.
Bryn MacKinnon, Senior Editor, Edmunds.com