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Originally Posted by Piwoslaw
The first thing to get effected by the thinned oil is the turbine.
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Turbine, as in turbo I'd think ?
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you have to fix the frequent burnout problem.
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Easier said than done, when even the dealer can't find the cause.
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Pug owners claim that if the regeneration cycles happen every 100km or less, then the DPF must be replaced.
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This is supposed to be a new DPF, I have only 12.000 km on it.
It was already regenerating quite frequently before replacement.
I don't know how often as I didn't keep track back then - but there's a note in my garage log here about 5 regenerations in some 900km.
It's back (or still) at that regeneration frequency despite the DPF swap.
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Though it is possible that one of the pressure sensors is malfunctioning (there are two presssure sensors in the exhaust: based on pressure before and after the DPF the ECU decides whether it is clogged*). A faulty sensor should show up on specialized diagnostic instruments, like Peugeot Planet.
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For a dealer, that should be something that's easy to spot, I'd think.
It's also what the service manager said it could be.
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If you've ruled that out then maybe your ECU needs to be reprogrammed?
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Would be lovely if they programmed the DRIVe software in it
But that probably won't be compatible.
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BTW, I not sure your Volvo does this, but in Pugs the rear window and mirror heaters turn off during regeneration to increase the load on the engine.
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On I guess ?
If it does so, then it doesn't show on the indicator lights in the switches nor on the dash.
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I'm amazed at the milage you're getting despite all these problems 
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Yeah, cheers
Worst case scenario if they can't sort it out, I'll push Volvo into issuing a new Certificate of Conformity for a non-DPF vehicle, sorting the official paperwork, and removing all DPF assorted junk.