You are in a great position.
As Aydan has already said, the common rail engine is EXCELLENT for a DPF, as it can control fuel injection and atomisation far better than PD can, and less soot is a result, all day, every day. The MK6 DPF design is entirely different to the problematic MKV, the first generation of DPF. In the MKV, the expensive platinium catalyst is combined with the physical Silicon Carbide DPF filter component, so when the filter eventually clogs, you are stuck buying the precious metal component as well. In the MK6 they are separate, so the replacement cost for a MK6 DPF filter will be coinsiderably less. Given you can get remanufactured MKV DPF's at under a grand in Europe, the MK6 will end up cheaper again aftermarket, plus I am working on being able to provide DPF cores in the future, both stock and hopefully higher flow, it's an aim for my business.
The DPF filter does not fill up over time per say, and even if it does, my car is still running the stock DPF and ECU, and at 85kms, is running better than ever. When I force a regen through Vag Com, I can still get my own DPF down to 1-2% clogged, and that's a long way from the 60% that causes error lights, and 80% that makes you visit a dealer. Miro is spot on mentioning Moreys Smoke Killer as much as he does, and it has dropped my DPF loading quite measurably, so I'd recommend you visiting Supercheap and buying a bottle, goes a long way for $30 odd.
Finally as many have already pointed out, getting the DPF hot is a key thing, so many short trips tend to make it load faster, whereas a trip on the highway helps it passively regenerate, and burn those visible soot particles down to the nano's, out of sight, out of mind. Overall Diesel uses less fuel per km, so despite your correct assumptions about the possible effects of nanoparticles, you would be producing more pollution in total in a V6.
The colder you can keep the air coming into the engine, the more O2 is available to burn, and the less soot produced. Reducing the EGR aids this process, and whilst EGR reduces NOX formation by keeping combustion temps down, even VW themselves say this produces more soot. Get some Morleys, do some spirited driving when you can, and look into hobbling the EGR somewhat.
Last edited by Greg Roles; 17-08-2011 at 07:03 AM.
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Originally Posted by Greg Roles
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