Ask Honest John

Most recently answered diesel engines questions
I am thinking of buying a Nissan Qashqai diesel for towing my 1300kg caravan, but have concerns about the DPF. Would the 1.2 petrol engine be powerful enough or should I go with the 1.6 diesel?
The ERG valve has failed on our 12 month old Range Rover Evoque. Coolant has entered the engine, what possible damage could have been done?
I currently own a 2006 Volvo V70 with a D5 engine. It has completed 130,000 trouble free miles and I want another V70, probably one year old. Not sure whether to go for another D5, or the latest D4. Is...
I'm thinking of buying a Mazda 6 (2011 model). I love the car but have heard of a few DPF issues with this car. Did this model get improvements to the DPF or is there anything I should look for?
I need to buy a used car for around £5000 to £6000. It must be larger than the Nissan Note and return decent fuel economyas I'll be doing lots of two hour drives. What do you suggest I look at?
We have a 2007 Citroen C4 VTR+ HDi hatchback and cover about 15,000 miles a year. We need to replace it with a comfortable car with reasonable carrying volume and a max width of 2000mm to go into a narrow...
I'm thinking of buying a 12 month old Audi A3 1.6 TDI. Does this car come fitted with the EA889 manifold? Why is this manifold so important when it comes to avoiding DPF faults?
I had a problem with the turbo on my Ford Focus 1.6 diesel (2007 model). The bearings failed due to a blocked oil strainer. I went for a refurbished BTN turbo replacement with the full fitting kit (oil...
Is it true that some VAG diesels have been built using the "Manifold in Head" tech that other makes (Renault) have used to good effect in reducing DPF problems?
I'm planning to buy an Audi A3 from the year 2012 onwards. I'd like a diesel, but can't decide between the 1.6TDI or the 2.0TDI engine. Which is more economical? Does this two engine have fitted DPF on...