Ask Honest John

Most recently answered diesel cars questions
I currently have a BMW 3 Series 3.0 E90 diesel automatic with 105,000 miles on the clock. Should I replace it because it's a diesel? I'm interested in an BMW M135i but currently cover around 15,000 miles...
I'm looking at getting a used car, no older than 2015, to use for about 25,000 miles of mostly motorway driving per year. Due to my mileage, I was looking at diesels but every day seems to bring more bad...
I'm a Motability hirer. For three years, I have driven a diesel Nissan Qashqai 1.5 and had no DPF problems whilst doing mainly short runs and covering 20,000 miles. My real mpg is approximately 45 - 60...
I'm about to change my Nissan Qashqai Acenta diesel for something similar, but I'm concerned about getting another diesel with all the current issues surrounding diesel cars. Am I worrying unnecessarily?...
Should I have the update to my Audi A4 2.0 and, if so, why? I can see no benefit for me and only risk that it causes a future problem that Audi disown. I've refused the update so far.
I'm experiencing a lot less mpg, more noise, more DPF regeneration and less power since my car had the emissions update in August 2016. If you are in touch with Volkswagen engineers in Germany, can you...
I had the emissions fix on my 2013 Volkswagen Passat 180PS three weeks ago. My trip is now showing a consistent 7 per cent worse fuel consumption and the burner is coming on more than it has ever done...
What should I replace my Land Rover Discovery with? I do 30,000 miles per year and it has to have genuine off-road capability because I visit farms for a living.
I have just bought a new diesel Renault Captur. Have I made a big mistake not taking heed of government warning?
I'm interested in spending up to £30,000 on a quality coupe. Is it unwise to be buying a diesel in the current climate?