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  Save and sound? 8 Aug 2009 (Ask HJ)
  My wife may soon purchase a Focus or Golf and we are wondering whether to go for diesel or petrol. The annual mileage will be about 10,000, mainly on rural...
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  Long-range fuel thanks 27 Jun 2009 (Ask HJ)
  I thought that your readers may find this interesting: I currently run a Peugeot 206 1.4 HDI turbodiesel. My motoring mainly consists of a 36-mile round-trip...
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  Do I need to use high octane fuel in my Porsche? 5 Apr 2024 (Ask HJ)
  Can you advise, my Porsche has 98 octane fuel printed on the filler cap. This is not always available and I use 95 Octane without any discernible effect,...
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  I have a diesel car that's been sat around for 8 months. Could this cause the injectors to fail? 2 Feb 2021 (Ask HJ)
  The engine in my diesel Mercedes was fine before but it was left sitting for nearly eight months, without starting. When it was started again the engine...
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  How long will petrol last when it's sat in a car? 17 Apr 2020 (Ask HJ)
  Could you advise on the shelf life of petrol? I refuelled my Volvo XC60 with Shell 99 RON one month ago and I've not used the car to go more than a few...
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  Would my hybrid car benefit from premium fuel? 22 Jul 2017 (Ask HJ)
  I have a new Toyota C-HR Hybrid in which I'll do about 8000 miles per year, mixed driving. I also have a 2016 Toyota Aygo semi auto in which I do about...
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  Will Volkswagen replace the injectors on my Volkswagen Caddy after the emissions fix? 22 May 2017 (Ask HJ)
  I've only had my 2010 Volkswagen Caddy Maxi for a month and the fuel injector has gone. The van has only done 77,000 miles. I read somewhere that Volkswagen...
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  What's the best way to start my standing 1996 Ford Mondeo? 2 May 2017 (Ask HJ)
  My 1996 Ford Mondeo been standing for three years. What is the best way to approach starting it again? I've fitted a new battery but it didn't start. The...
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  Chrysler Voyager fault codes - what do they mean? 27 Oct 2016 (Ask HJ)
  I have a 2004 Chrysler Voyager diesel auto, which I've owned for three months. It seemed fine, until recently, when it started making a clonk noise and...
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  Supermarket fuel vs independent suppliers - which is best? 29 Dec 2014 (Ask HJ)
  Last week you advised against supermarket petrol. I have long been confused about this issue. I have been told by one chap who was 23 years in the oil...
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  How do you measure real fuel consumption? 18 Nov 2014 (Ask HJ)
  Most of the fuel consumption figures given by the public and your reporters are taken from the fuel consumption gauge. On all the cars I have own this...
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  Daewoo Matiz suffering from faulty fuel gauge 11 Nov 2014 (Ask HJ)
  My girlfriend has a 2004 Daewoo Matiz. It's a great little car for what we paid and is in pretty good condition with lowish miles and has been reliable...
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  Should I use a petrol additive in my classic Mercedes-Benz? 5 Sep 2018 (Ask HJ)
  I have a 1966 Mercedes 230SL, which I use lead substitute whenever I fill it. Should I add a fuel system cleaner every so often and will the lead and fuel...
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  Why is the fuel distance calculation incorrect? 30 Dec 2016 (Ask HJ)
  I have a new 2016 diesel Audi A3. I have a couple of questions. 1. After I open the filling cap there is another door which needs to be pushed very hard...
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  I misfuelled my C-Class - what should I do? 4 Dec 2014 (Ask HJ)
  I filled my Mercedes-Benz C250 with petrol instead of diesel. I realised when the engine began to falter after about 25 miles and stopped the car. Mercedes-Benz...
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  Should my Ford Mondeo be returning better fuel economy than just 47mpg? 3 Apr 2011 (Ask HJ)
  I purchased a new Ford Mondeo 2.0 Duratorque TDCI (115PS) 6-speed manual in October last year. The car has now done 6,500 miles. The Ford brochure indicates...
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  No fuel like an old fuel 31 Jul 2010 (Ask HJ)
  Several weeks ago, I accidentally put 20 litres of unleaded into my 9 year old, 93,000 mile 1.9D Renault Kangoo. I immediately filled the rest of the tank...
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  What could be causing my Renault Clio's starting problem? 13 Jul 2010 (Ask HJ)
  I have a 2003 Renault Clio 1.5 DCi with 70,000 miles. When starting from cold, the engine turns and fires but does not pick up. On the third attempt the...
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  Fuel if you think it’s over 20 Feb 2010 (Ask HJ)
  I have a Sept 2006 Suzuki Grand Vitara 1.9DDIS which I bought about 18 months ago with 19k miles from a non-franchised dealer. In April of this year at...
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  Which estate cars offer the best fuel economy? 22 Jun 2020 (Ask HJ)
  What’s the most economical diesel, estate?