[officeplant]

>USA actually has pretty strict emissions standards for diesel engines, so most cars on the road are relatively clean burning gasoline cars.

If by that you mean bad smelling poorly running clunkers everywhere then yes. But mostly because we don't do emissions testing at all outside of one or two cities in my state.

[weberer]

No, I mean federal emissions standards of NOx. The ones that are so strict that Volkswagen had to cheat the tests just to pass.

https://en.wikipedia.org/wiki/Volkswagen_emissions_scandal#U...

[officeplant]

I'm aware we're technically strict, but I don't see the EPA shutting down roll coal culture any time soon. It took us this long to catch Cummins[1] after VW got dragged through the courts. At this point I find it hard to believe any diesel motor truly passes US emission standards.

[1]https://cleantechnica.com/2023/12/27/cummins-fined-1-67-bill...