So you recon the injector blowby increases deposits in the engine and creates more of a build up?
Ford seem to recommend that the injectors are tichtened down on every service, PSA do not. Which possibly explains why less Fords are prone.
We've got DV6 OCD here, our C3 Picasso is serviced every 5-6K with only Citroen filters and the correct low sulphur Total ECS oil. I'm still paranoid and keep on about getting rid of it before it turns nasty, doesn't help that the engine is getting louder and has occasional bad running. They're a superb engine for economy and they drive well, but I'd always choose the 2.0HDi when its available.