Ask Honest John

Most recently answered diesel cars questions
Should I get rid of my 2014 diesel BMW 525?
My wife and I have a young and growing family. Our 2009 Audi A3 Hatchback 1.9 TDI is now creaking at the seams and we're looking for a secondhand practical vehicle. It needs to be capable of carrying up...
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 recently purchased a 2015 Vauxhall Astra diesel 1.6 CDTi, attracted by the high quoted MPG of 76 (combined). I always calculate the cars MPG when I fill up, as well as recording the figure the car says....
My 2010 SEAT Leon 1.6 TDI is being called in for its emissions fix. But before this could be done my car went into limp mode and a failed injector was diagnosed. Is this common on this car?
My SEAT had the "fix", which has ruined the performance and fuel consumption and will likely lead to EGR failure in the future. Can I reset it by disconnecting the battery? Slim hope, I know.
Why do your car reviews still recommend diesels, when London and other European capital cities are making owning diesel cars so much more difficult ?
Can someone enlighten me as to why my car is not performing as it was before it went in for the emissions fix? The emissions light comes on continually and the coil light is now on an off, plus it keeps...
I've had the emissions fix done on my SEAT Leon and now the car is a dog. Can Volkswagen reinstate the old engine remap and remove the flow obstructer from the inlet? The car is doing 15 per cent less...
There's a lot of talk in the press of scrapping old diesel cars. What constitutes old? Can we put dates or is it defined by emissions?