No. They deliberately programed entire generations of diesel engines to give the wrong smog emissions results by knowing the environment and duty-cycle of emis

No. They deliberately programed entire generations of diesel engines to give the wrong smog emissions results by knowing the environment and duty-cycle of emissions testing. On both total emissions as well as emissions/ton/mile metric, long-haul commercial fleet diesel trucks are far better than the millions of polluting and poorly maintained small displacement privately owned diesel cars and pick-ups.