Yes checked that, both the filler cap and the dip stick all clear and as you would expect, well when I say clear the dipstick has oil on it of course!
Strange if it is this DPF thing, I have had two Diesel Meganes before this car and never experienced this behaviour, do the Meganes 1.5 dCi's not have DPF?
The other thing that concerns me is that I do 100+ miles a day to and from work and this weekend I had done a 100mile round trip down the motorway the preceding day so I thought that would have cleared everything out.
Lastly when you say take it for a blast, do you mean put your foot down and rev the engine or is it purely down to length of journey and prolonged engine temp. I say that because I am still not pushing the engine probably peaking the revs at 3,000 revs on gear changes (probably lower in most cases), is this not enough for DPF?
Lastly why are not told about this behaviour in the manual or at the handover at the showroom as I can imagine quite a few people getting concerned about it when it happens to them.