Re: Surely this is a form of fraud?
"That's nothing to do with urea injection which reduces nitrogen oxide emissions"
No, they're linked. You either run the engine slightly inefficiently, which produces low NOX and high Particulate Matter (and then deal with the PM via recirculation and DPF), or you run the engine hot which gives a nice clean burn with low PM but high NOX and deal with the NOX via AdBlue/Urea (SCR - Selective Catalytic Reduction).
You pick one strategy or the other, and this is seen especially strongly in off-road plant equipment, which is sold either with DPF (which increases diesel burn but requires no extra work) or SCR (which requires you to stock AdBlue on site as well as diesel).
DPF is favoured for rental fleets since it's often hard enough to get customers to put diesel in the right tank, never mind complicating the issue with Ad Blue! Other buyers go with products that meet emissions by using AdBlue.
AdBlue has not seen great penetration into cars yet (though there are some), because a lot of motorists simply don't want the hassle of filling two tanks and will live with their cars having to undergo a regen cycle now and then.
Biting the hand that feeds IT
