Ask Honest John

Most recently answered dpf questions
My 2016 Toyota Yaris diesel fuel consumption meter indicates a large increase in consumption for about 25 minutes every 350-400 miles. Is this the DPF regenerating?
I own a 2011 Audi A6 Allroad 3.0 TDI 240PS 6 speed auto with paddle shifts (98,000 miles). Other than 10,000 mile oil changes, what would you recommend doing to keep this on the road for a few years? It...
I had the emissions update on my SEAT Ibiza 1.6 TDI Sportrider. Eight weeks later, the turbo blew. SEAT tried to blame me by saying there was too much engine oil. I got an oil sample done and the oil was...
I stumbled across a couple of issues which seem to do the rounds on various forums, so I thought I'd ask here for a definite answer. One is that the Start-Stop mechanism, as implemented in the Audi A6...
The emissions fix was done on my 2010 Volkswagen Golf 1.6 TDI in January 2017 and it now drives very differently. The DSG gearbox changes up into seventh gear much earlier than before (at around 40mph)...
I have a 2011 BMW 320d. It's the N47 engine and had the timing chain done last year at 130k miles and was done at 80k miles. It's now covered 182k miles mainly motorway driving and the DPF light keeps...
I'm dwelling between getting several diesel cars. What is the best choice: the 2015 Toyota Auris Estate 1.6 diesel, 2015 Honda Civic Tourer 1.6 diesel or 2015 Skoda Octavia Estate 1.6 diesel. What is your...
I recently bought a 2011 Audi A6 2.0d that has done 55,000 miles. I was driving on the motorway at about 70mph when the car lurched and the engine management light came on, followed by the engine losing...
Has anybody else had a reduction in their fuel economy following the recent emissions upgrade? The range on my Audi A4 has gone from 620 to 570 miles per tank. Audi say it's nothing to do with the upgrade,...
I've recently purchased a 2011 Ford Galaxy 2.0 TDCi. After the local Ford dealer changed oil and all filters they advised me to (as the car was immobile for months) execute the following procedure after...