Ask Honest John

Most recently answered diesel particulate filter questions
I have a 2007 Focus 1.6 TDCI 110 DPF with 89,000miles. Got it eight months ago when it had 82,000 and was fantastic until recently when I noticed a drop in mpg from around 45-50mpg to 35-40. I live in...
I'm an estate agent who drives 5 miles to get to work and 5 miles back, together with numerous local appointments throughout the day with engine on/engine off and 30 to 60 minute intervals inbetween. We...
I am thinking about buying a Honda Civic or Toyota Avensis diesel car dated before the fitting of DPF. I am concerned about the Dual Mass Flywheel and would like to know which of the above car engines...
My friend's engine failed completely after only 15,000 miles, dealership says the cause was too much oil in the engine, but he has never added any between services.
Recently bought X-trail and it has a certain degree of what I can only describe as hesitancy or very slight judder/cough and splutter, always round about 2000rpm, mostly in 2nd gear. It doesn't happen...
My nephew has recently purchased a brand new 2012 Corsa. It has been back in the garage five times due to what they are calling 'blocked filters' caused by the fact he's not doing enough milage in the...
Has my car got a DPF? It's a Ford Focus Studio estate 1.6 TDCI (57 plate), first registed 17-01-2008)?
I've been noticing frequent issues where I lose a slight amount of power, and my mpg drops by about 10mpg. I've noticed the engine takes around 10 minutes/7 miles (same journey every morning) to reach...
My BMW 525 diesel ( 04/54 ) has now covered 73,000 miles mainly around town with occassional long runs and the service computer is showing 90,000 miles to a DPF change! I mention this because, as a regular...
I'm after a turbo-diesel 2-litre and have £2000. I would like something with room and comfort for long journeys. I like the look of a 110hp C5 any thoughts? Anything comparable from other manufacturers...