I have a 2008 Fiat 500 that has destroyed itself in this way after only 16,000 miles
The DPF light came on and the lady sat on her driveway revving the engine up for 15 mins instead of driving it
The next time she drove it it ran away with itself, scared her half to death and ran until it was destroyed.
It seems to have added itro 2.5 litres of fuel into the oil