> the tricky question: did anybody figure out how to do a clean enough diesel engine without cheating Yes. It is just more expensive in terms of maintenance be

> the tricky question: did anybody figure out how to do a clean enough diesel engine without cheating Yes. It is just more expensive in terms of maintenance because the urea-based cleaning liquid ("AdBlue") needs to be refilled by the dealer a lot more often if the exhaust scrubbing doesn't cheat and disable it half the time. If you are interested in the details of the topic, I can recommend this CCC conference talk from last month: https://media.ccc.de/v/33c3-7904-software_defined_emissions https://media.ccc.de/v/33c3-7904-software_defined_emissions