2014 Mazda 3: 39 MPG on a Highway Drive
June 19, 2014
In our last fuel economy update for the 2014 Mazda 3 we noted the car's lifetime average so far: 28.9 mpg. It's an OK number, but we've been doing a lot of urban driving these past 8,000 miles. I wanted to know what our 3 could achieve in a more theoretical sense.
Early on with our 3, we did record one fill that resulted in 41 mpg. But it's worth noting that we filled up after driving just 80 miles on that trip. It'd be nice to back this number up with a little verification.
For my trip I drove 242 miles, of which about 90 percent was highway driving. That highway driving was at speeds a little over 70 mph with the air conditioning on and using cruise control when possible. Ideally I would have liked to drive even further to reduce any margins of error but figured 240 miles is better than nothing.
When I pulled into the gas station to fill up the Mazda 3's in-car fuel economy gauge, it was showing 36.5 mpg. Yet when I did our official math calculation, it turned out our 3 achieved 39.5 mpg. The official EPA highway estimate is 37 mpg. Not too shabby for our little Mazda.
Brent Romans, Senior Automotive Editor @ 8,293 miles