The 2019 Mazda 3 Skyactiv 2.0L came into the workshop showing the typical signs we see with modern direct injection engines — carbon buildup and less-than-ideal performance. Unlike traditional engines, GDI (Gasoline Direct Injection) systems don’t wash the intake valves with fuel, which leads to carbon deposits forming over time. Left unchecked, this can affect airflow, efficiency, and overall drivability. What We Carried Out: • Carbon Walnut Blasting A full walnut blast was