Sounds nasty! Bean counters strike again, might have been $10 cheaper than a chain.... in the short term...
Yea, my last dpf burn took <2mins, but my short trips are 20km each way so eng is at operating temp a lot of the time.
The misses diesel i30 is at 250,000km with timing chain, supposed to be a "don't touch unless it is noisy", and I believe that (even motorcycle is timing chain, and people have been getting 300,000km on that motor)
I'll have to try the 15w-40 once I have used up my 10w-40 stock. (darn sales 😆)