Most recently answered diesel particulate filter questions

Last week you wrote about DPF clogging to contaminate lubricating oil. My computer says I have a reduced oil level but the dip stick confirms correct amount. I get black smoke on accelerating.

Recently retired and want to buy a used car that has a very comfortable ride.
I have considered a Jaguar XF or Lexus IS250 but would welcome your opinion and/or further recommendations.
Budget £25-28K,...

Finally I have made my mind up to go for a used Mondeo estate, about 1 year old. I have discovered about possible problems with the DPF, as I would only be doing approx 3,000 to 4,000 miles per year, mostly...

My Hyundai Santa Fe diesel auto has 62k miles, is 4 years old and hence still has one year warranty. The car has been and still is ideal for my needs and I have no particular wish to change it. However...

I am retiring in January next year, my current company (lease) car (Skoda Octavia L&K Estate 20. DSG) expires when 4 years old in December. Mileage at that point will be around 32,000.
I am considering...

Considering Mercedes CLC '08/'10 180 Kompressor petrol auto.
Daily drive is five miles, weekly some 30 mile trips, monthly an occasional 60+ miles.
Should I go for a diesel auto though? Don't like...

Do you know of any forthcoming changes to VAG diesels, such as chain cam and/or less problematic DPF?
Are DMFs used on automatics/DSGs by VAG or Hyundai? Will VAG be introducing the more efficient 7-speed...

Please explain why Mazda 6 2.2L diesels do not have the same DPF problems as the Mazda 6 2.0L diesel (where the sump can fill up with diesel oil)?

I have a Skoda Yeti 2.0 Diesel with DSG. 5,000 miles a year, 40% of my journeys less than 5miles. Would a fuel additive reduce the chance of clogging and, if so, how often should I use it?