The problem with this view is that emissions are a function of engine management. As with any engineering decision, trade-offs have to be made to hit goals. Ad

The problem with this view is that emissions are a function of engine management. As with any engineering decision, trade-offs have to be made to hit goals. Adjusting the code to lower emissions will absolutely impact power output and fuel efficiency. This impacts the consumers directly. And anecdotely, was the reason most people bought TDIs - the amazing combo of power, efficiency and percieved "greeness"