Hi. I have had various Skoda Superbs over the years and used them for private hire/airport runs. Brilliant cars! My latest one does however seem to have a DPF problem. 2011 2.0 TDi CR 170 Elegance estate. Bought to use as spare private hire vehicle and general runner. Bought with 202,000 miles with plenty of history albeit nothing to prove cambelt changes or DSG services. Has been running well and covered 11,000 miles since start of December - Currently 213,300. Oil usage negligible - certainly less than my now 100k miles MK3 Superb. Recently noticed regens quite frequent and car bit smoky during regens. Yesterday on 60 mile round trip appeared to be regenerating most of the time. Has just done the same this morning on 70 mile round trip (A roads). Appears to be randomly smoky - looks blue in mirror - guessing overfuelling while trying to regen? Still performing well and no lights on yet! Oil level fine - if anything has gone up slightly - guessing diesel in oil. Due service tomorrow anyway so at least oil being changed. Looks like new DPF time? 

It's probably the DPF alright given the mileage. It would be worth having it scanned for fault codes before taking the plunge though: overly-frequent regens can also happen when the differential pressure sensors on the DPF fail, and they're a cheaper/easier fix.

Yes certainly looks like DPF. Used car this afternoon on  another 70 mile round trip and still same. Seems to start regen as soon as moving really - can tell straightaway due to higher rpm gearchange and 950rpm tickover. Doesn't seem to stop regen at any time and fans running when turn off engine. Do wonder if got dpf sensor problem? Also ran it below quarter of a tank this afternoon to see if that stops regen as had been told less than quarter of a tank and won't regen. No difference. Have to see what my mechanic says in the morning

Overfueling via the DPF would see white smoke, that's what mine did.

 

Blue smoke is burning oil. If oil is leaking past a worn turbo and making it's way into the DPF it will be restricting the exhaust gas flow and initiating a regeneration. A hot DPF and pooling oil equals blue smoke.

 

A faulty DPF sensor almost always results in an EML or glowplug light.

 

An increasing engine oil level is worrying, diesel is mixing with the oil, likely from repeated interrupted DPF regenerations or leaky injector seals.

 

Have you scanned the car for fault codes? VCDS will also reveal the ash load content inside the DPF, a good indicator of the DPF's condition.

I find the the VAG-DPF App jolly useful. You can then keep a constant eye on regens, ash content etc.

 

Drefaldwyn