Ask Honest John

Most recently answered dpf questions
I'd like to buy a diesel BMW X3 2.0 but most of my journeys are short. What would be the negative effects on the car from my driving pattern? Are there any small changes to my driving, like doing a 50-mile...
I do a 40 mile round trip every day with a mix of roads, including 70mph dual carriageway and a stretch of motorway for about 10 miles each way. Would a hybrid be suited to this driving? If no, I'm going...
I have a 2010 Volkswagen Golf Plus 1.6 turbodiesel which had its emissions 'fix' done at 43,000 miles. Is it better to get rid of it or should I just wait and see if the DPF lasts for a couple more years?
You say the underlying maintenance cost is the reason for the collapsing of diesel car prices. I'm concerned because I own a 63 reg Ford Mondeo Estate 2.0d, with 40,000 miles that I plan to keep for another...
Are second-hand diesel prices likely to collapse over the next two years?
At present, I own a 2015 Renault Captur 1.5 dCi. I use it for short runs around town, with the occasional 50/75 mile trip. My son tells me I would be better with a petrol Captur. Do you agree with him?
My daughter has bought a three year old Isuzu pickup truck with only 12,000 miles on the clock. The DPF light keeps coming on, the main dealer says that this is normal because it shows that the regeneration...
My 2010 Volkswagen Golf 1.6 TDI had its emissions fix in January 2017. Prior to this, I've owned it for five years with no issues. Last week, a flashing glow plug coil came on now and then. Mechanic told...
I'm undecided whether to buy a petrol Jaguar F-Pace 2.5 T R-Sport or a 2.0 diesel AWD180 auto (which we have tried and is adequate). The 2.5 petrol is £3130 list more than the 2.0d. The petrol has urban...
How will the emissions update affect the EGR and DPF in my 2009 Audi A4 170PS diesel. It has only 64,000 miles of mostly motorway driving and has been maintained over recent years by an independent VAG...