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Re:Four more carmakers join diesel emissions row by mturmon on Saturday October 10, 2015 @12:02AM (#10364469)
"Its not clear this [lab-vs-road discrepancy] is any kind of problem."

I agree with what you said, except this.

Clearly these NOx emissions are a problem, because they cause smog (like ozone), which is a health hazard. The city where I live has too much ozone for many days of the year, for example.

Unless this problem can be controlled, vehicles like these should not be sold here, and people will have to find other options, or technologists will have to develop better cars.

Re:Four more carmakers join diesel emissions row by XorNot on Saturday October 10, 2015 @04:01AM (#10364860)
Except that's not what he was saying. It's been known forever that stated milage and actual mileage differ because the lab test is in a lab.

If people want more accurate tests, then the lab test needs to be modified to be realistic.

Re:Four more carmakers join diesel emissions row by mturmon on Saturday October 10, 2015 @07:56PM (#10367470)
My point is that this discrepancy has, in the real world, proved to be a huge public health problem. And we are not talking about mileage. We're talking about NOx that produces O3.

See also nearby: https://news.ycombinator.com/item?id=10364933