what some folks forget is the true amount of pre80's cars there really are on the road. I read an article that said that something like 1/2% of all cars on the road were pre80 & for the most part those were collector cars that might get drove 5,000 or less a year.
Lets not forget that large companies get to buy pollution credits also & one way is to buy up old cars & crush them. That way they don't have to clean up their own pollution. PLUS I truly wonder how much of this so-called air polution we supposible make might be coming from overseas where they basicly have no pollution regulation..joe