Dumbest thing? I mean it indeed does reduce airflow and hence reduces power, and increases fuel consumption. And eventually they will need expensive replacement. But of course they also do actually help dramatically reducing carbon particles which does help city air quality.
(It does seem weird that F150 gasoline needs it while new diesel pickups can still be sold with smellable level of particles coming out. But I guess these fall into a different truck classes?)
It in NO WAY "dramatically reducing carbon particles". Have you read ANY of the studies? I have. Do you understand the chemistry, or just accepting what the EPA is feeding you? The percentage change in comparison to the negatives, is hilarious. This is not the way!
OMG..."Smellable" OH NO! You realize you are smelling the catalyst and the Urea being sprayed in the exhaust right?
You do know the DPF's in diesels while yes, do prevent that "dreaded" black puff of smoke, in total they decrease efficiency, and total in small diesels per gallon increase emissions. How could that be. BECAUSE they decrease MPG, so more fuel is burnt increasing total emissions, that does not actually help with TOTAL emissions. It is short sighted.
Why is it short sighted, because by adding PFI(Port Injection) alone to motors that already have GDI(Direct Injection) they could see a 50% decrease in particulates. In addition, and this is where it gets real fun...why did manufacturers switch to GDI which by the way has 3-4X the particulate emissions...for emissions. Anybody else see the irony? Both injectors, and using them at the correct times, makes BOTH better. But instead, here we are.
