As long as some "Boffin" at Mazda doesn't try to equate short journeys in my case as the root cause of the problem, then suggest it is my driving style etc that is behind this.
I replace my car every 3 years, and always diesel. whether VW group, Peugeot/Citreon and Saab, never before have I had similar issues.
My "runs" are into town and back approx 4 miles each way, and up to my local golf course, about 1 mile each way. But there are plenty of long motorway trips as well.
My next door neighbour bought a Diesel BMW about 6 months before I bought my Mazda and undertakes much about the same journeys that I cover. He has not had any issues, and he has been assured by BMW he will not need to have an oil change for at least 18,000 miles.
Since the mod I haven't really been anywhere, and I'm in Canada at present so won't be doing anything for a while, but I will keep an eye on things once I get back.
If all sorted, then all fine dandy.
Will wait & see.
Alex