Mazda has been named as the most fuel-efficient vehicle manufacturer of 2013, cnbc.com reports.
The Japanese automaker was named top of the pile by the Environmental Protection Agency (EPA), after rolling out a number of energy-efficient measures across the year.
The EPA poll found that during 2013, Mazda's vehicle fleet averaged a fuel economy rating of 27.5mpg, beating off nearest contender Honda, which could only offer 27.0mpg. VW and Subaru, meanwhile, each managed to post an average mpg of 26.2, whilst Nissan followed with 25.3.
Although this is good news for Mazda, critics have claimed the results are skewed in its favour, as the Mazda range is much more limited than its competitors. As such, it's easier for Mazda to gain lower mpg figures for a fleet that is made up mostly of cars and one small minivan, compared to the likes of Ford and BMW which also has a huge line in fleet vehicles.
In the case of Ford and BMW, they managed 22.6 and 24.4mpg respectively.
Responding to the reward, Mazda claimed it would not rest and is taking a novel approach to ensuring its energy efficiency continues to advance over the years to come.
President and CEO of Mazda in North America, Jim O'Sullivan, told sys-con.com: "While other manufacturers have turned their attention to hybrids and electric cars, we chose to focus on perfecting the base technology used in more than 90 per cent of the cars and SUVs sold today: the internal combustion engine.
"Through analysing and refining this technology, as well as every other component in a modern automobile, Mazda has been able to achieve class-leading fuel economy in nearly every segment it competes in and bring that technology - at an affordable price - to every customer."