COMING: The 70 mpg Mazda2? “Mazda, which has no hybrid engine systems of its own, has taken to vastly improving its line of gas and diesel engines to compete with hybrids. If these rumors are true, not only are they competing, but completely blowing the competition out of the water. A 70 mpg gas-only car would outdo every hybrid on the planet. Of course, it depends on what continent the mpg is calculated, as Japan, America, and Europe all have different standards.”