In the case of the DEF it absolutely reduces the lifespan of the engine. A truck engine that could last 500K miles lasts 200K max.
Factor a second or third engine (whole new truck) and the energy and pollution to produce it and DEF looks not as great.
Vehicles and engines that last 25 years are easy to build yet they are rare outside of commerical and military.
The whole argument is disengenuous and proceeds from an unstated a priori desire by government to restrict movement of citizens and markets, rather than as a real requirement for a real benefit.
Factor a second or third engine (whole new truck) and the energy and pollution to produce it and DEF looks not as great.
Vehicles and engines that last 25 years are easy to build yet they are rare outside of commerical and military.
The whole argument is disengenuous and proceeds from an unstated a priori desire by government to restrict movement of citizens and markets, rather than as a real requirement for a real benefit.
It's all so tiresome...