Comment by cpgxiii

> Americans don't like diesel cars... It makes no sense to regulate emissions on diesel passenger cars in the USA.

That doesn't follow. Americans don't like diesel cars because emissions-compliant diesel cars are a massive pain in the ass. Diesel emissions treatment systems are a maintenance pain, as indicated by how many people with diesel trucks perform illegal emissions "deletes". The "magic" of VW's cheating was that it minimized or eliminated this pain, so all the owner was left with was the increased MPG, and this was pretty popular. It wasn't more popular because (1) plenty of people who would have considered a diesel with this ease-of-use would not have considered a VW, and (2) none of the other automakers could compete, because, you know, the cheating.