Earlier quoted context omitted.
> My truck (24 years and change) will smoke a bit if I stand on it and the fuel flow outruns boost coming up, but it's also entirely emissions compliant and passes the tests cleanly - it's just something older diesels do under certain conditions I always thought that banning old diesels from centers of European cities was just silly (they passed their emissions after all so they can't be billowing smoke, right?), tha…
Emissions standards change over time. You could get some really polluting cars in the old days, and you can't anymore. Why should we be breathing in the smoke from these old cars from an era where emissions and pollution weren't taken as seriously as now?
For every hipster yuppie driving "muh classic Hilux just like daddy owned in 1993" there a few dozen people living out of the back of a Caprice Classic wagon because they have no better option.