Are diesel DPFs evolving to the point where problems are disappearing?

I was interested to read your recent comments about certain vehicle models appearing to be DPF trouble-free. Is this because they have markedly different systems for regeneration of the filter, or some other reason? If some manufacturers can achieve this 'utopia' do you think we can look forward to a brighter DPF future across the board?

Asked on 2 November 2013 by PP, Preston

Answered by Honest John
We're now at about the same level of development of DPFs as we were for catalytic converters in 1997. Many of the first generation were disastrous. But engine and DPF development has taken place since. Best to avoid old tech diesel engines that were never originally developed for DPFs. And preferably go for one with the exhaust manifold incorporated into the cylinder head as that is bound to be more effective because the DPF heats up more directly. (Mazda 2.2 Skyactiv, Renault 1.6DCI, Vauxhall/Opel 1.6CDTI.) To achieve EU6, most diesels (apart from Mazda’s Skyactiv) require an expensive additive called ‘AdBlue’.
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