>
> The problem is in unwillingness of americans or unaffordability to go
> and see Europe in details. Who visit? Or recent college graduates, or
> elderly. Both groups aren't interested in what powers vehicles: gas or
> diesel.
>
People don't go on vacation to study vehicle engine systems.

I lived in Europe for 30 years and diesel passenger cars were as rare
there as here.

Diesels have the reputation of being dirty and noisy and they will never
get rid of that reputation. Electric or fuel cell vehicles will arrive
before diesel is accepted.