Ask Honest John

Most recently answered diesel car maintenance questions
I have a Volvo S80 D5 and regularly do long journeys but not at more than 3000 revs. Should I drop a gear to keep revs up to clean the DPF?
I am about to order a new Land Rover Discovery. Should I be worried about the possible bans on diesels in certain cities? Would that concern warrant going for the 3.0 petrol instead? Oddly, I read that...
My 2014 SEAT Alhambra has had a problem with the AdBlue warning light coming on regularly. Each time a warning said 'fill before 600 miles', I filled it. Even though it was completely full I got an orange...
I currently run my motorhome once a week. I take it out on the road and drive it around for approximately 16 miles at various speeds between 20mph and 55mph on different road types. Is this enough exercise...
I have a 2015 Peugeot 308 BlueHDi and my wife is about to order a MINI Clubman D. Both currently have £20 annual tax but what will be the move to increase both tax and area restrictions on low emission...

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