Socom I beleive the DPF would go before the PIEZO injectors, that said. I strongly urge for most of you to use a DIESEL Inejctor cleaner. I for one failed to use it for a month and when i added it my car reacted differently and after two 150 mph runs the car is running wayy better and getting beter mileage as of today I have measure 70 miles on half of a quater of a tank expecting at minimum 100 per first quarter of the tank, mind you my driving is mostly performed in the traffic jam cities in Puerto Rico taht is why on Weekends I beat my DIESEL like a pimp
on a corner whore
LOL