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What does 'Unblock Diesel Filter' mean on my Citroen C5? 2 Sep 2010 (Ask HJ)
Please can you confirm what 'Unblock Diesel Filter' means on my Citroen C5? My local garage (non-franchise) state that they have checked and can't see... -
Smoky Skoda Octavia - what's wrong? 2 Aug 2013 (Ask HJ)
I have 2003 skoda Octavia diesel that blows smoke on start-up. Any idea what's wrong? -
Is there an Esso equivalent of Shell V-Power? 2 Oct 2012 (Ask HJ)
Is there an ESSO product that is equivalent for Shell V-Power for both petrol and diesel? -
Why does our Mercedes-Benz CLS 320 cut out for no reason? 10 Jun 2012 (Ask HJ)
In May this year our 52,000 mile 2006 Mercedes CLS 320 CDI suddenly stopped without warning with the ignition switching itself off and the key rotating... -
Garage charging excessively and not repairing the problem 30 Jan 2012 (Ask HJ)
My X-Type is suffering excess fuel consumption and poor acceleration. My local garage stated it had two leaking diesel injectors and gave an estimate of... -
I'm buying a new car, do I go for petrol or diesel? 21 Aug 2020 (Ask HJ)
I'm buying a Mercedes-Benz E-Class Convertible. Do I buy petrol or diesel? Which model do you recommend? -
I do 13,000 miles per year - should I go for a petrol car or the cheaper diesel version? 24 Mar 2018 (Ask HJ)
I do approximately 13,000 miles a year and quite a lot of motorway driving. I've seen a good deal for a 2016 Skoda Octravia vRS 2.0 TDI with only 2000... -
Price bull? 24 Jan 2009 (Ask HJ)
Having bought my first diesel this year I am fed up watching the difference between diesel and petrol prices grow ever wider. Currently the margin is around... -
Which fuel additives can I use in my Audi TDi? 23 Feb 2013 (Ask HJ)
When I looked up the Platinum Plus additive on Google it threw up several other additives also. All claimed to decrease fuel consumption, give smoother... -
How do I regenerate my vehicle's DPF? 7 Jan 2018 (Ask HJ)
Can you please advise how to regenerate the DPF on a Mercedes-Benz E-Class? -
Out of warranty MINI fault - what are my legal rights? 30 Mar 2015 (Ask HJ)
My wife has owned her 2011 MINI One D from new. The other day the car started making a rattle from the rear driver's side. Upon closer inspection the bolt... -
Are modern diesel cars really so prone to faults? 3 Mar 2012 (Ask HJ)
As a regular reader of your column in ‘Motoring’ in the Telegraph I am concerned about your comments, on a regular basis, about ownership of diesel-powered... -
Can new diesel engines keep the particulate filter clear? 18 Jul 2022 (Ask HJ)
Is it true that new cars such as the Land Rover Discovery Sport use automatic engine management adjustments to keep the particulate filter clear even if... -
I read that engine oil is contaminated by the DPF in 4x4s - is this the case with all diesel cars? 13 Feb 2018 (Ask HJ)
I read in a recent 4x4 review that the engine oil is quickly contaminated by the DPF. Is this the case on all diesel engines with a DPF, and can it affect... -
Need a large family car, which will also suit a wheelchair user 2 Dec 2013 (Ask HJ)
I want to buy a new family car that can carry five people, including a wheelchair user. The car must have a large boot, roomy seats and good fuel economy.... -
Will the Porsche Cayenne stop-start system damage the battery or DPF? 26 Oct 2013 (Ask HJ)
A friend is purchasing a Porsche Cayenne diesel with a stop-start fuel saving cut-out facility. Firstly, does this rapidly destroy a battery (with all... -
Second hand car for £8k 8 Apr 2012 (Ask HJ)
My wife and I are downsizing from a Volkswagen Transporter to something more practical. We have a budget of about £8,000, and would like a large, fuel... -
Gas trick influencer 19 Sep 2011 (Ask HJ)
I am about to retire and would like to reduce running costs on my 60,000mile Chrysler 300 CRD. I would like to improve the fuel economy, which at the moment... -
Whether forecast? 10 Sep 2011 (Ask HJ)
Can you say what type of air condition makes a petrol/diesel engine more efficient? Cold air, warm, damp, dry - all variables that might affect fuel consumption... -
Buying a used MPV,Crossover,4x4. What would you recommend? 3 Jul 2011 (Ask HJ)
Can you please point me in the right direction? Looking to buy a 2-3 year old MPV, Crossover or 4x4. Preferably automatic and preferably disesel (chain...
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