Ask Honest John

Most recently answered dpf questions
I am interested in a Ford Kuga Diesel, but have read that it may have an Eolys additive system on it. Going on various friends' bad experiences with this sort of set-up, I absolutely will not buy a diesel...
You often talk about the relationship between short journeys from cold in diesel engine cars and the premature failure of diesel particulate filters. In this context what do you class as a short journey?...
You keep talking about the problems associated with DPFs. I have a 56-reg Volkswagen Passat TDI 140 and I only do 7000 miles a year. My daily commute is a round trip of 20 miles and I would rarely do anything...
Does the above vehicle have a diesel particulate filter? No mention was made about this when my wife and I ordered one last month from our local Honda dealer. Neither is there any mention of this in the...
Please could you advise what to do about a new Vauxhall Combo SE 1.3 van I bought in May 2010? It is hesitating and losing power, and our local dealer can't detect a fault.
A couple of months ago, I bought a secondhand 2007 Citroen C5 2.0 HDi auto. This is obviously a rep's car, given the 72,000 miles on the clock. Again, no problem, as this is good, honest mileage and the...
If I treat myself to a new or nearly-new Jaguar XF 3.0 diesel and only drive it at weekends and maybe some evenings, will the DPF be ok as long as those journeys are not short stop-start and the revs are...
I drive an 09 SEAT Altea XL. Does this car have a diesel particulate filter?
Does my 2002 Volvo S60 D5 have a particulate diesel filter?
Where can I get a list of new 4x4 diesels that do not have a DPF fitted?