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  Who is responsible for my Ford Focus suffering from a blocked fuel filter? 11 May 2013 (Ask HJ)
  I recently had a problem with my 2-year-old Ford Focus diesel whereby the car went into limp mode on the outside lane of a dual carriageway. The eventual...
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  Can a bi-fuel car run on petrol only? 23 Feb 2024 (Ask HJ)
  I've been offered £450 off the list price for the Bi-Fuel Dacia Sandero, but there are no LPG stations near me. Should I take it and run it on petrol only,...
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  Is using Shell V-Power once every five tanks worth it? 30 Aug 2023 (Ask HJ)
  Is a tank of Shell petrol V power every 5th fill worth it? Does it have a decent cleaning effect over one tank of fuel? Should I go with it consistently?
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  Would corroded fuel filler pipes be grounds for a recall of the 2006 - 2012 Toyota RAV4? 11 Apr 2017 (Ask HJ)
  Increasing numbers of 2006 - 2012 RAV4 owners are reporting fuel leaks caused by corrosion of the fuel filler pipe. This is due to the use of thin low...
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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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  Is there a benefit from alternating V power and FuelSave Diesel whilst saving on fuel costs? 25 Jan 2014 (Ask HJ)
  As an alternative to Supermarket Diesel whilst attempting to keep fuels costs down, will I get some benefits from alternating Shell V Power with Shell...
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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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  Fuel leak in a Movano 1 Nov 2011 (Ask HJ)
  I have a 2001 2.2 DTI Movano. It has fuel leaking from a pipe behind the engine which looks like some kind of leak off. Does anybody know what the...
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  Lack of power/ poor fuel consumption 28 Mar 2011 (Ask HJ)
  My 1.8litre Duratec Mondeo is suffering from poor acceleration and high fuel consumption. I have changed the spark plugs & fuel filter, but it has made...
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  My Ford Fiesta diesel won't start - is air in the fuel system causing this? 16 Jul 2010 (Ask HJ)
  I have a Ford Fiesta Mk6 1.4TDCi and, for the past few weeks, the car won't start on a morning. I have found air in the fuel pipe but no diesel is leaking...
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  Does E10 petrol reduce fuel economy? 21 Feb 2022 (Ask HJ)
  The new E10 petrol, that we must now use, do you get less miles per gallon out of it?
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  Is a large increase in fuel consumption a sign of the DPF regenerating? 28 Apr 2017 (Ask HJ)
  My 2016 Toyota Yaris diesel fuel consumption meter indicates a large increase in consumption for about 25 minutes every 350-400 miles. Is this the DPF...
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  Does sport mode increase fuel consumption? 4 Apr 2017 (Ask HJ)
  I've just changed my Porsche Boxster 981 for a 718. I've only had one automatic in 44 years, but the PDK is fantastic. Anyway, I know the sport button...
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  Are performance fuels worth the extra cost? 2 Jun 2014 (Ask HJ)
  Is standard or higher octane petrol used in EU economy testing? And is it worth paying the extra in an ordinary car?
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  Engine reluctant to start 6 Dec 2012 (Ask HJ)
  Our Peugeot 107, seems reluctant to start. It used to start at the turn of the key but recently it either starts then dies or does not start at the first...
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  How do I change the fuel filter on my Citroen Dispatch 13 Dec 2011 (Ask HJ)
  How do I change the fuel filter on my Citroen Dispatch. It's a solid state type.
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  Warning message of blocked fuel filter on Peugeot 307 HDI 15 Jan 2011 (Ask HJ)
  Warning message has come up saying blocked fuel filter. I've changed the filter already, yet still receiving message. Any ideas on how to cure it?
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  Not getting through 25 Apr 2009 (Ask HJ)
  My Jaguar X-Type 2.0 diesel stopped and I called the AA. They said it was starved of fuel with the tank half full. They also said there was no fuel coming...
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  Why is my Nissan Almera not starting? 5 Jan 2017 (Ask HJ)
  I have a 1998 Nissan Almera. I parked it up the other day and it wouldn't start. Tried to bump start it but nothing, it just turns over and isn't firing....
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  Diesel bug in BMW 7 Series - any advice? 10 Dec 2015 (Ask HJ)
  I have been told by my BMW dealer after spending £1000 that the reason my car stops running is that I have a diesel bug that has damaged the high pressure...