Nothing like the cars from the '70s or earlier. Every once in a while driving, I'll pass a restored car from the 60s or 70s going the other way, and can smell the exhaust for about a mile. And that's one car.

My car (gasoline Euro-5) smells only when the engine is cold. Once it warms up, I can't smell anything. I guess it probably means that the catalytic converter is working as expected (it needs to be hot enough to work properly).

One funny thing I've realized is that I like the smell of coal fires. It must have been horrible back when cities were choking on it, but coal is so completely phased out now that when I occasionally do smell coal smoke from a domestic fire or say a steam engine I really like it.

s/bad/good/g