Dave Plowman (News) wrote, munging the attributions:
Chris Bacon wrote:
And the US of A - natural home of the cat. - has rather colder weather
than us in many parts.

And far longer "normal journey lengths", so the proportion of time
spent driving with a non-functioning catalytic converter is far less.

Those 'longer journeys' are likely to be out of town. Plenty will do short
town trips as in the UK.

Obviously, but on average the journeys are likely to be longer.


So, how long *does* it take for a catalytic converter to "fire
up" and start working properly?