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  Why do automatics use more fuel? 26 Nov 2014 (Ask HJ)
  Why do all the new Korean cars (Kia, Hyundai) have such appalling CO2 and fuel consumption figures when an automatic 'box is fitted? I wrongly thought...
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  Can I change my Rover 45 from fuel injection to carburettors? 15 Oct 2018 (Ask HJ)
  Is it possible to change this car from fuel injection to carburettors?
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  A garage did £2400 of unnecessary work to my car - can I claim this money back? 8 Mar 2018 (Ask HJ)
  My 2004 Toyota Previa suffered loss of power in the snow. The AA got it to work enough to drive it to my dealer. Even though the AA driver told them about...
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  Why is the fuel consumption on my 308SW so high? 21 Dec 2013 (Ask HJ)
  I run a 2009 Peugeot 308SW 1598cc petrol. I have been very pleased with it, apart from the fuel consumption which has never exceeded 40mpg even on a long...
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  How do manufacturers calculate their official fuel consumption figures? 16 Nov 2013 (Ask HJ)
  With regard to manufacturers' fuel consumption figures for their vehicles, I fully agree with comments made in your columns about them being unachievable....
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  Ford Focus in-tank fuel pump 10 Jan 2013 (Ask HJ)
  The in-tank fuel pump in my July 2009, 1.6 Petrol Ford Focus failed on 26 December 2012. The AA transported the car 140 miles to my local independent garage...
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  Why don't motorway service stations advertise their fuel prices on the motorway any more? 14 Jan 2012 (Ask HJ)
  A few weeks ago you ran an email complaining about high fuel prices at motorway service stations. Several years ago there were large signs before the service...
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  Fuel consumption on a Kia 7 Jan 2012 (Ask HJ)
  Please note the 67.3 mpg combined you show and Kia show in the information for this model I believe is not attainable in normal driving if there is such...
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  Do you have any advice on dealing with Audi after the emissions fix caused increased fuel consumption in my A6? 13 Mar 2017 (Ask HJ)
  I've just taken my Audi A6 in to have the emissions fix because Audi insisted that the performance, fuel consumption and CO2 emission will not be adversely...
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  Should I take a trader to court over a faulty car? 10 Sep 2014 (Ask HJ)
  I have recently brought a car from a trader without a warranty. I bought the car two and a half months ago, but have had nothing but problems with it....
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  Is it worth buying a new petrol car with the climate change movement suggesting that fossil fuels need to be eradicated as soon as possible? 15 Oct 2019 (Ask HJ)
  Is it worth buying a new petrol car with the climate change movement suggesting that fossil fuels need to be eradicated as soon as possible?
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  Mazda 6 lacks power on cold mornings 8 Nov 2016 (Ask HJ)
  I have a Mazda 6 diesel (2006 model) that lacks power when cold. In fact, in the mornings, it is difficult to get it past 45mph, although it works fine...
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  Should I use supermarket fuel? 27 Mar 2014 (Ask HJ)
  Other than the increased octane rating, does Tesco Momentum U/L have any other advantages over their basic U/L and how does it compare with Shell Fuelsave...
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  What's causing my Volkswagen Sharan to vibrate on idle? 10 Oct 2013 (Ask HJ)
  My 2005 Volkswagen Sharan sometimes vibrates on idle. What’s causing it?
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  What's causing my E-class to suffer poor fuel consumption and loss of power? 15 Sep 2013 (Ask HJ)
  My Mercedes-Benz E-class is very heavy on fuel, yet it has next to no acceleration. What’s going on?
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  Small car recommendation please 17 Dec 2012 (Ask HJ)
  I want to buy a second-hand car for 25 mile commute (busy roads) & longish runs. £4500 budget or thereabouts. High reliability is a must; high fuel economy...
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  How important is the heat shield 21 Mar 2011 (Ask HJ)
  A heat shield at the back of my Vauxhall Astra H has fallen off. I think it protects the fuel tank but I'm not 100% sure. How important is it to get...
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  Will Citroen contribute to repairing corroded fuel injectors on our C3? 17 Aug 2010 (Ask HJ)
  My wife has an 05 Citroen C3 which we are very pleased with. However, it has just been diagnosed with 'corroded fuel injectors' due to leaking from the...
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  What do you think about FTC fuel pellets? 13 Feb 2018 (Ask HJ)
  I've seen FTC, an apparent miracle additive that improves fuel economy and lowers emissions, advertised. The reviews are very favourable. I've never seen...
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  Why are fuel prices so different in continental Europe to the UK? 6 Sep 2012 (Ask HJ)
  Can you explain why the concept of supply and demand in terms of diesel and petrol prices is turned on its head in continental Europe, where the price...