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  Performance fuels - which is best? 1 Jan 2015 (Ask HJ)
  You frequently encourage readers to use Shell Nitro+ diesel, and on a recent trip that went through Edinburgh I brimmed my tank twice with the fuel, and...
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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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  Engine glitch on Hyundai i30 7 Nov 2013 (Ask HJ)
  The engine on my Hyundai i30 diesel has started going into a limiter mode and will stick at 40mph. It is only rectified by stopping and restarting. No...
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  Mondeo rattles when starting from cold 3 Jun 2013 (Ask HJ)
  When starting my 2010 Ford Mondeo from cold I can hear a light rattle/tinkle when under acceleration between 1250 - 2000rpm. There is no noise when...
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  Should I use premium diesel in my 10-year old BMW? 14 Nov 2012 (Ask HJ)
  I recently bought my sister's BMW 3 Series E46 (2003) Touring, which had 93,000 miles on the clock. She was using diesel from the nearest garage when necessary...
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  What evidence do you use to recommend premium fuels? 13 Oct 2012 (Ask HJ)
  What evidence enables you to recommend certain fuels to your readers who are worried about supermarket fuels?
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  Which fuel should we use in our Vauxhall Corsa VXR? 19 May 2012 (Ask HJ)
  My son bought a 2010 Vauxhall Corsa VXR from a franchised dealer and we would be grateful for your advice on which grade unleaded to use and when to change...
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  Ford Fiesta 'Engine System Fault' 13 Mar 2012 (Ask HJ)
  Frequently at 70mph the 'Engine System Fault' message appears and the car, 2008 Fiesta TDCI goes into Limp Home Mode. Ford plugged it in and said that...
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  Why is our Hyundai Getz only returning 27mpg? 14 Jan 2012 (Ask HJ)
  Why do you think my wife's Hyundai Getz 1.4 CDX automatic is giving such poor mpg? It averages just 27mpg and although it is only used around town we are...
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  Maintaining a car for the long term 5 Dec 2011 (Ask HJ)
  I have owned my four-year-old Berlingo Multispace 1.6hdi (old shape) from new and always had it serviced on time by Citroen. It has covered 50K miles,...
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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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  My Ford Mondeo screeches under acceleration - why? 16 Aug 2010 (Ask HJ)
  I have a Ford Mondeo 2-litre TDCi. I put some V-Power fuel in it last week and it started belching out black smoke and misfiring more than usual. On further...
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  Supermarket fuel v branded fuel - which is best? 27 Mar 2024 (Ask HJ)
  I have a question for you about what is the best, most suitable fuel (petrol) to put in my recently bought 2019 Kadjar S Edition 1.3 TCe 140 EDC with 21K...
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  Why does my Ford Focus lose power? Is it related to replacing the turbocharger? 12 Aug 2010 (Ask HJ)
  I have a V-reg Ford Focus 1.8 TDi. The turbo went and covered the whole engine in oil, so I had that replaced and the engine cleaned off, but now i have...
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  Can't reach max RPM in a Primera? 3 Sep 2013 (Ask HJ)
  My Primera has about 95,000 miles on the clock. It has two problems - the first is the idle sound, which oscilates a bit and sounds like it has sudden...
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  What sort of mpg will I get from a Honda Civic? 7 Jan 2014 (Ask HJ)
  I am looking to buy a 2010 Honda Civic 2.2 diesel. It has covered 34,000 miles and the dealer wants £10,695. Is this a good deal? What sort of mpg should...
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  Honda CR-V windows getting stuck - what's causing this? 14 Nov 2016 (Ask HJ)
  I own a Honda CR-V (2004 model) and sometimes, when the front passenger window goes down, it will not go back all the way up. It stops half way. It does...
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  Is ethanol going to damage my classic car? 24 Jul 2020 (Ask HJ)
  I run a low mileage 1988 Jaguar XJ-S. I have always run it on V-Power - which for a long time did not apparently have an Ethanol content, now it is 5%....
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  Can I do anything to improve the fuel economy after the emission update? 1 Jun 2017 (Ask HJ)
  My Skoda Yeti 2.0 TDI had the emissions update six months ago. I have since discovered a drop of 6.5mpg. Skoda say they cannot do anything, can anyone...