In the EU, with Euro 5+6 particulate limits for gasoline engines have been imposed as well. The previous rationale was "no limits are required because particula

In the EU, with Euro 5+6 particulate limits for gasoline engines have been imposed as well. The previous rationale was "no limits are required because particulates are a diesel issue", which is bonkers because if it were so, one could simply apply the same limits to both and the gasoline engines would have passed with flying colours. My guess is heavy lobbying from automakers managed to keep these unregulated for so long, since indeed direct injection (which seems to be the new norm) makes fuel economy better but particulates worse. https://en.wikipedia.org/wiki/European_emission_standards#Emission_standards_for_passenger_cars https://en.wikipedia.org/wiki/European_emission_standards#Em...