The Mitsubishi GDI engine significantly cuts CO2, NOx and unburnt hydrocarbon emissions. By reducing fuel consumption by 20%, CO2 emissions are also reduced by 20%. NOx is reduced by 95% by a three-step process, including Exhaust Gas Recirculation. The final step is a new Selective Reduction Type catalyst developed by Mitsubishi because, unlike an NOx Trap Type catalyst, its performance will not deteriorate dramatically over time.