Ask Honest John

Most recently answered diesel car maintenance 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...
You have wisely advised owners of diesel turbo cars to idle the engines after a fast run before switching the engine off. Is the same advise also applicable to petrol TSI cars, such as the Volkswagen Polo...
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?
I bought a Honda Civic diesel in October 2013 and have had filter problems for the past two months. I'm retired and don't drive long distances, so the filter icon lit up on the dashboard. When I took it...
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...
Why are Europeans encouraged to buy diesel cars with cheaper priced fuel when we are told to get rid of ours?
I'm a London taxi driver. My cab is a 2006 TX 2 that's done about 234,000 miles on the original engine. Recently, the oil pressure warning light has started to flicker when the engine has warmed up, more...
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...