Got me wrong there Pablo. Unlike edy I am no fan of the DPF I think they are just another way for engineers to make spurious emissions targets driven by the EU.
The new hot potato being particulate.
I wouldn't buy a recent Passat unless it was manual and Common Rail as the Passat from 2006/7 on is one on the most unreliable vehicles that VAG have produced in a while.
VAG have a habit of building bad products these days and then wriggling on claims. Loads of the little petrol engines fitted to VW and Skoda models have been having top end trouble and VAG have been less than active in fixing things though I had similar wih Seat in 2000 when they refused to swap a gearbox making strange noises at peak torque. Good PR is as much a part of the VAG experience in the UK, press still big them up and sales are good so why fix any issues? Who would believe a VAG product would let you down?
Probably most relevant is the fact that dpf's are only becoming common now, my Volvo for example is a Euro 4 model and has no DPF as they are only needed for the upcoming Euro 5, vehicles have been making Euro 4 without a DPF for years, my tdci Mondeo was a 2005 and also Euro 4.
The DPF problem is dealt wih by removal the EU knows this and this is why they are trying to make a vehicle remain with this millstone during its life by making it compulsory for annual emission tests, even though a car without it will still pass the emissions test in the UK without it.
Perhaps consideration should be given towards stopping 3rd world countries from polluting as much rather than costing EU and soon US motorists a fortune in DPF maintenance.
My point may have been missed when you read my last post but dpf's will and do fail on a regular basis even with the right oil, my previous emoter had this issue with the DPF equipped Vauxhall Zafira, they were DPF equipped from late 2005, the only way to make them reliable was remove he DPF but they were unable due to being a public body.
They were actually made to recently retro fit all the 2.7's with DPF's all for EU compliance even though a vehicle with same emissions and a smaller payload of same age wouldn't need to have one.
Here is an good example of EU madness.
A Euro 3 Pathfinder will do around 28/30mpg.
A Euro 4 one with DPF will give around 21/22mpg.
So which one pollutes more?
Same with the Zafira in my experience they do 16/7mpg round town, have driven loads of them between 2006/10, and the only way to get go mpg is to get rid of the DPF.
Newer systems may be getting better as all new tech does, but to put in high saps oil is madness and a bad, bad idea, as said a DPF that doesn't Regen completely will tend to dump fuel in the oil in huge quantities and ruin the engine quickly, not an issue with Eloys systems, but a big problem for the majority which run passive systems.
High saps oil will cause the EGR to soot up from what I have read and what I would expect, a messed up EGR system will ruin. DPF quickly aswell.
Note I have seen nearly new DPF equipped diesels go bang due to lubrication issues when a few months old. This was long after the wrong lube was used at my previous job. They are still going bang regularly but not as bad due to much shorter OCI on low saps oil.