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  Why doesn't our Chevrolet Aveo return its quoted mpg figures? 27 Jul 2013 (Ask HJ)
  I am writing to you regards the 1.2 Chevrolet Aveo LT we have just bought. We acquired it on 25 March and have now done 3000 miles but just don't seem...
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  What's causing a misfire on our Ford C-Max? 8 Jun 2013 (Ask HJ)
  I have a Ford C-Max 2.0 diesel (80,000 miles, around 53/54mpg), which has always been main dealer serviced by the book. It suits us well and goes very...
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  Rav4 power loss 1 Jun 2013 (Ask HJ)
  The car has an intermittent fault. When occurring there is a sudden power loss. The engine does not stop but pushing the accelerator has no affect. You...
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  Replacing a CA T after warranty work? 21 Apr 2013 (Ask HJ)
  I wrote to you some time back about a misfire on my wife's Vauxhall Corsa. Eventually, after a year they have managed to fix it. My only concern was the...
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  DPF ruining MPG? 7 Mar 2013 (Ask HJ)
  I've read and understand all your replies to the 'my car doesn't achieve what the official figures say', but I have had a shock on my recent change of...
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  What should I replace my faithful Honda CR-V with? 12 Jan 2013 (Ask HJ)
  I am having to think about getting rid of my beloved Honda CR-V. It is now 14 years old and has been the best car I have ever owned. I bought it when...
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  Could you do a long range economy test on a hybrid vs a modern diesel? 17 Nov 2012 (Ask HJ)
  I love diesels as they suit the terrain here in southern Spain; lots of steep hills where you do not need to change to a lower gear to easily get up them,...
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  Tax hypocrisy - do you agree? 8 Nov 2012 (Ask HJ)
  On the subject of the road fund do you have a view as to where it is going? I'm not a fan of road tolls for existing roads. I feel it is now highly...
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  Is it fair to compare my 2007 Volvo D5's fuel economy against the 2013 model? 8 Nov 2012 (Ask HJ)
  I was pleased to get 49.4 mpg real whilst averaging 53mph over 760 miles. The combined "book" figure for my 2007 Volvo D5 manual was shown as 41.5mpg and...
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  Are diesels as economic as they used to be? 30 Jun 2012 (Ask HJ)
  I am due to replace my BMW 330 diesel coupe this year. I drive around 20,000 miles a year, mainly on motorways. With the gap in prices between petrol and...
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  I misfuelled at Shell 22 Mar 2012 (Ask HJ)
  I am another poor soul who mis-fuelled his car at Shell - due to their V-Max marketing. I used a pump which was coloured red, white and black to fill my...
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  Why can it take days to notice that a vehicle has been filled with the wrong fuel? 17 Mar 2012 (Ask HJ)
  With reference to DS Wellesbourne wondering why it took five days for misfuelling a diesel to manifest itself, it would be because of the petrol being...
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  Should I buy a petrol or diesel Grand C-Max for short commutes with longer weekend drives? 18 Feb 2012 (Ask HJ)
  I'm interested in purchasing either a brand-new 1.6 petrol Ecoboost Grand C-Max or a nearly new 1.6 diesel Grand C-Max. Both are the same price at £16,500....
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  Is the 1.6-litre Ford Focus turbo petrol a solution to the DPF and DMF problems of diesel cars? 18 Feb 2012 (Ask HJ)
  Your warnings on the failure costs of turbos, DMFs and DPFs mean that the very features that reduce fuel usage and emissions raise the risks of high repair...
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  Sergeant Pepper 15 Aug 2011 (Ask HJ)
  I have recently acquired a new KIA Picanto 1 and a very accomplished little car it is too. Naturally, the engine will need to go through it's ‘break in’...
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  These fuelish things remind me of you 9 Aug 2011 (Ask HJ)
  I went to your website on real fuel figures and found that it is based on a month's consumption. My figures are based on 20,100 miles since new in a VW...
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  Economy con 30 Jul 2011 (Ask HJ)
  I read with interest comments on fuel consumption in your column. We have had a Golf Mk V Estate 2.0 TDI auto estate for over a year. It returns from...
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  Consumed by consumer 30 Jul 2011 (Ask HJ)
  How meaningful are the published Official Fuel Consumption Figures? A friend of mine has a 9-month-old Vauxhall Astra. He has run three tests, over a distance...
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  My Jaguar XF returns 40-41mpg which is close to the official figure of 42mpg. 28 May 2011 (Ask HJ)
  Some manufacturers seem to manage to make their cars deliver closer to the official fuel figures than others. As the owner of a Jaguar XF diesel I get...
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  Fiddly fuel filler 5 May 2011 (Ask HJ)
  I recently bought a Ford Ka "Studio" and have serious problems when trying to refuel the car, due to the design of the lockable filler cap. The problem...