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  Why is my Volkswagen Golf IV cutting out? 25 Jul 2010 (Ask HJ)
  My 2000 Volkswagen Golf IV 2.0-litre automatic runs fine from cold, but when it warms up it starts to misfire, then has no power and then cuts out. I have...
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  Not getting through 20 Jun 2009 (Ask HJ)
  I have followed your suggestions on using Shell V Power fuel, high revs, and petrol cleaners (3 times). However I am still having problems as the engine...
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  What damage can misfuelling do? 25 Mar 2022 (Ask HJ)
  My son has a 5 year old diesel car and told me that he had a half tank full (about 28 litres) of premium diesel in it and then went to top up to full but...
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  Benefit of premium petrol? 8 Sep 2015 (Ask HJ)
  I have often seen your endorsement of 97 Octane fuel as worth the extra cost. I have owned from new my loved 2002 Honda Legend. Recently I had the chance...
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  Who’s fuelling who? 29 Dec 2012 (Ask HJ)
  I always find V-Power fuel to be really good on engine of all the fuels that I have used over the years. Does this mean using supermarket fuels result...
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  Could an electrical fault be causing power loss in my son's Volkswagen Polo? 15 Sep 2011 (Ask HJ)
  My son’s Volkswagen Polo gave us some trouble on the return journey form holiday last week. After running for about 80 miles the engine suddenly lost all...
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  Can you answer my technical questions on diesel engines? 20 Apr 2013 (Ask HJ)
  I have a few queries on diesel cars that I would be grateful for your advice on. 1. With regards to the diesel particulate burning cycle, what is the effect...
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  Golf returning poor fuel economy - are the new tyres to blame? 11 Nov 2014 (Ask HJ)
  I recently replaced old "Event" tyres with new Michelin ones on my wife's 2006 Volkswagen Golf diesel. On a regular round trip of 120 miles, her on-board...
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  Emissions software has increases the fuel consumption on my Audi A1 - what can I do? 28 Mar 2017 (Ask HJ)
  I have an Audi A1 Sportback, bought new in 2012. Current miles on clock just under 33,500. Last month it went in for the emissions software installation...
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  Are fuel additives worth it? 11 Jul 2023 (Ask HJ)
  Do you recommend any diesel additives? My 2011 Nissan X-Trail 2.0l dCi has done 115,000 miles and is serviced every year but the mpg seems to be getting...
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  Which brand of premium petrol is best? 6 Jul 2020 (Ask HJ)
  Could you please advise which is the better petrol: Tesco 99RON or Shell’s 98RON?
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  Is a fuel system flush worth it? 28 Sep 2018 (Ask HJ)
  My Dacia Sandero Ambience has just had its third service by the main dealer. They are recommending a fuel system flush to remove moisture. My car has only...
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  Vauxhall Antara Fuel Gauge/Sender Problems - what's the cause? 24 Oct 2016 (Ask HJ)
  I had a Vauxhall Antara and have had an intermittent problem with my fuel gauge dropping off occasionally to read empty even if the tank is full. Unfortunately,...
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  Need a cheap small car with good fuel economy - what do you recommend? 27 Nov 2013 (Ask HJ)
  I am starting a new job and will need to commute 25 miles each way. I am looking for a new car that is very fuel efficient (my current 2005 Ford Focus...
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  Can you recommend a specialist who can repair a misfuelling error? 2 Feb 2013 (Ask HJ)
  On Saturday evening, with the distance to empty stating 40 miles on his 2002 Audi A4 1.9 TDI estate, my father misfuelled, putting approximately 25 litres...
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  Does my Qashqai have a fuel consumption problem? 27 Oct 2012 (Ask HJ)
  I recently bought a Nissan Qashqai 1.5dCi and have been disappointed with the average fuel consumption of around 35mpg, and with the power and smoothness...
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  Nissan Note fuel capacity 4 Oct 2011 (Ask HJ)
  I recently bought a 58 reg Nissan Note Tekna with 7100 miles on it. I would like to know the capacity of the fuel tank and also when the fuel indicator...
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  Bio beware 4 Sep 2011 (Ask HJ)
  I recently read a small article concerning fears associated with new legislation from the EU and subsequently the UK, on increased use of biofuel content...
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  Which vans are best for fuel economy? 11 Sep 2010 (Ask HJ)
  I'm getting a van and I want one in which two people could sleep in the back and do some rough camping on surf trips. The biggest issue for me is fuel...
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  Why's the fuel filter alarm light coming on in my KIA Cee'd? 23 Jun 2010 (Ask HJ)
  I have had a KIA Cee'd 1.6 LS for 15 months now and have been very happy with the performance. It is used mainly for longer distance motorway driving when...