Not bollox vikkiz, my dpf notice was coming up when I started to drive over 80 kph the notice disappeared, it was coming on once a day, I had another 2500 kms to go before the oil change. It was coming on for 5 days I changed the oil and filter and everything went back to normal running. The oil holds carbon the oil was saturated with carbon from city driving when working. So the dpf is taking in more as a consequence. I have nearly 300,000 km on same dpf and all going fine, my wife has 340,000 on a 10 year 7 seat C4 Picasso on same dpf with no problems.