I wrote recently, and thank you for the reply, about my 2011 X-trail and the "flatness" around 2000rpm. My dealer says they all do it, something which I cannot believe and after much effort have now got a Nissan GB technician to attend the dealers when I take it in for the 4th time.

However, can I ask what you think of the following - I've always used Shell diesel, apart from some 1500 m in France over the last couple of weeks when Total was used on a couple of occasions, but on returning home I filled up with Shell V Power and guess what? A well behaved engine.

Now of course I don't want to have to rely on using this diesel, although I fully appreciate the advantages in economy as well as it clearly suiting my car, but surely I shouldn't have to rely on it and anyway shouldn't my dealer have told me all this, and Nissan advise all X-Trail owners that their Renault engines are fussy?