It has been a while since I touched on the subject of Mazda giving diesel a shot again in the United States. Back in 2012, it looked promising that we would be getting the Skyactiv diesel-powered vehicles like the rest of the planet. After working on the calibrations to meet the U.S. emission standards, Mazda discovered they could meet the emissions, but could not hit the power levels to give owners the driving experience Mazda is known for. Mazda wanted to hit the targets without the addition of urea injection to clean up emissions. They were squarely behind the diesels, even racing the Mazda 6 diesel in IMSA, 25 hours of Thunder Hill, and in prototypes. In the end, the diesels were abandoned, but the message was still there: Diesel models will be sold in North America, it just became a when.