Ask Honest John

Most recently answered diesel engines questions
I have a 2011 MINI Countryman. A friend has been smelling diesel fumes when we were driving along for a while. It has just been checked by my local dealer and they have found a leak from the ejector. They...
I have previously read your comments on modern diesels complexity (DPF/DMF/EGR/Turbo) possibly being problematic with high miles unlike older diesel engines. Would these issues be true of the Honda i-DTEC...
There's a strong smell of diesel in my 2010 Nissan Qashqai after ignition, is there a specific reason for this
What is the difference between the BMW 218d and the 220d? Is it just the engine mapping? Can't they both be remapped to run the same power?
I would like to purchase a Ford Galaxy diesel. Can you tell me which models don't have DPFs and does the Galaxy switch from torque converter to DMF at any point?
Can you tell me if the 2007 Mitsubishi Outlander 2.0 diesel suffer with DPF problems?
I am looking at a new Audi A3 diesel, can you tell me if this car has any DPF problems? And is it ok for regular short trips?
My 2009 Volkswagen Touareg is starting to make a clatter on start-up, which lasts for 30 seconds. My local dealer has said that nothing shows on diagnostics and once running the car is fine. Can you offer...
I am looking to buy a medium to large used diesel estate with an automatic gearbox on a budget of about £8000. The car will be used mainly for commuting which will alternate between a round trip of 80...
We are planning to change my wife’s Toyota Rav4 for a Nissan Qashqai, but the only automatic version has a 1.6 diesel engine. I think I recall that when Nissan introduced the 1.6 diesel on the old Qashqai...