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  Engine issues when petrol low 11 Jun 2015 (Ask HJ)
  I have a BMW 116 2006 model where everything seems to be fine until petrol is low the symptoms start to show. First the engine management light will come...
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  Which fuel for the new Golf? 31 Oct 2014 (Ask HJ)
  What octane petrol should a new Golf with the 1.4 turbo engine use? My previous mkV 1.6 FSI had to run on 98 after burning out a nox sensor on 95/97. Is...
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  Car cuts out when towing a caravan 10 Sep 2014 (Ask HJ)
  When towing my caravan, the engine in my 2005 Hyundai Sant Fe cuts out tackling steep hills or pausing at a roundabout. The car will restart after 30 seconds...
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  Can you recommend a small car with good fuel economy? 24 Apr 2014 (Ask HJ)
  I am looking for a used small car that will be very cheap to run, with high mpg and a reliable (diesel preferable) engine. I do about 13,000 miles per...
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  Would I get any benefit from switiching to Shell V-Power or similar? 27 Jan 2014 (Ask HJ)
  I usually fill up with branded diesel rather than supermarket diesel but would I get any benefit from switiching to Shell V-Power or similar? My car has...
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  Can you recommend a diesel automatic for £10,000? 14 Sep 2013 (Ask HJ)
  With a budget of £10,000, what Focus or bigger-sized diesel auto would you recommend secondhand? I'm running 30,000 miles per year, so it shouldn't be...
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  Diesel pump failure killed my Note 27 Mar 2013 (Ask HJ)
  My 6 yr old fully serviced Nissan Note 1.5DCI, with 70K miles refused to start. It has gone to the garage and the diesel pump has failed, pushing metal...
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  Hot Starting Problem on a Volkswagen Golf 29 Jul 2012 (Ask HJ)
  No problems for the 1st 105,000 kms. For 5,000km have had a hot starting problem; replaced fuel filter and ECT sensor; diagnostics indicate no problem....
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  Why shouldn't I use supermarket fuel? 1 Jul 2012 (Ask HJ)
  I get the impression that you think it best to avoid supermarket petrol. Why?
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  Where are my figures going in Real MPG? 20 May 2012 (Ask HJ)
  I have twice posted my real world fuel consumption figures to your site and on both occassions thay have subsequently disappeared. Why is this happening?
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  Shell V Power and Tesco Momentum 99 24 Jan 2012 (Ask HJ)
  Thanks for your prompt reply to using Unleaded Fuel and putting in additive. No more Redex for me. Just read a report which compares Tesco Momentum 99...
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  petrol or diesel for fuel economy? 2 Dec 2011 (Ask HJ)
  I'm looking to buy a replacement family sized car in the new year, I want something good on fuel econonmy and am considering a diesel. I feel that if I...
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  Driller thrillers 28 Nov 2011 (Ask HJ)
  In November 2009, holes were drilled, at night, in the fuel tanks of a number of cars in Kingston, Surrey. On 04 November 2010, a person was convicted...
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  Vauxhall Curser 1 Oct 2011 (Ask HJ)
  Three years ago we bought a Vauxhall Corsa Design 1400 automatic. We like the car but we are not happy with the fuel consumption. The manual says it should...
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  For richer for pourer 4 Sep 2011 (Ask HJ)
  I have a Jaguar XF 2.7D. I have always used Redex Fuel System Cleaner, but wonder if it is really of any use? I only drive about 5,000 miles per year and...
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  Supermarket diesel? 1 Aug 2011 (Ask HJ)
  I own a Toyota Corolla Verso 2.2 D4D. The Toyota dealer recommended that I not run the car on diesel purchased from supermarkets (do you agree with him?)....
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  Thanks for presenting your true mpg figure database, and don't blame the manufacturers for trying. 16 Jun 2011 (Ask HJ)
  Congratulations on launching a table to reflect true average fuel consumption figures (www.honestjohn.co.uk/realmpg). You cannot really blame the manufacturers....
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  Real life fuel economy register 8 Jun 2011 (Ask HJ)
  I filled out the real life figures for my Honda Jazz 1.2 in April /May. My figures were included and gave my true readings. However the site has taken...
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  Rip off Britain? 11 Feb 2011 (Ask HJ)
  I have just returned from Tenerife, a Spanish island in the Atlantic, miles from anywhere. Diesel fuel is 0.844 cents per litre or about £0.75 pence per...
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  Air flow meter 10 Feb 2011 (Ask HJ)
  Just brought a new air flow meter off ebay, was £32 and works fine, but think my fuel economy has gone down. I am getting at best 300 miles for a tank...