The Passat and other AdBlue
The Passat and other AdBlue equipped VWs are identified as violators. Presumably these cars can be fixed by changes that consume more AdBlue. Why this would result in loss of power or mileage does not seem to make sense. Perhaps VW will also have to limit fuel delivery at the same time? Was VW trying to save money on AdBlue top ups under its included new car service plan? Was VW trying to deliver a car that provided satisfying fuel economy and AdBlue refill intervals? How does BMW manage to make 2 liter diesels with so much greater performance than VW while still complying with the law?