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  Excessive fuel consumption on a Focus 1 Jan 2012 (Ask HJ)
  Earlier this year my fuel consumption reduced by about 5 to 10%, I check the consumption weekly and do the same journeys each week. I changed the air...
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  Diesel Fuel Quality 22 Nov 2011 (Ask HJ)
  Following your advice I usually use Shell Diesel (I know you recommend some other varieties), I pass on this advice to others. However I usually get a...
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  Misfuelling - have I caused damage by driving? 9 Oct 2011 (Ask HJ)
  My car was nearly empty. I put about 13L of unleaded-petrol in my 2008 VW Golf TDI 1.9. I was told if I filled the car up with diesel it would be fine....
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  Buzzing/Crackling sound when hitting 2000rpm 4 Oct 2011 (Ask HJ)
  Over the last day or so, I have noticed a buzzing/crackling type sound (appears to be from the dash area) when accelerating at around 2000rpm. It seems...
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  Limping Vectra 31 Aug 2011 (Ask HJ)
  Bought this car for my wife about 6mths ago and when we first got it every month or so the spanner light comes on and it goes into limp mode, once you...
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  Have you had any feedback on Tesco's Momentum99 premium fuel? 19 Jul 2010 (Ask HJ)
  My W-reg Audi 1.8 Sport was bought new and has done 58,500 miles. I normally fill up with Shell V-Power following your advice and I like the improved smoother...
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  Big banger theory 6 Feb 2010 (Ask HJ)
  I have about £800 to spend on a family car for two adults and two kids. What would you recommend? I have seen a 1999 Vauxhall Vectra 2.0DI turbodiesel,...
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  Dies sulk 26 Sep 2009 (Ask HJ)
  My 1.8 TDCi Mondeo (fuelled with Shell V Power diesel) is only returning an average fuel economy of 41mpg. The car has done just over 1,000 miles. Is this...
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  Something nissing 7 Mar 2009 (Ask HJ)
  I own a 2004/54 Nissan Micra, which has done 13,500 miles and was chosen as a retirement car. I thought being English/Japanese it would be reliable, but...
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  What's the best SUV for new parents? 26 Aug 2014 (Ask HJ)
  We're looking for a SUV to cater for our new family. The car will have to take a child’s seat and pram. We've narrowed it down to the Nissan Qashqai 1.6...
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  Could I buy a diesel Freelander 2 for short journeys? 4 May 2013 (Ask HJ)
  I thought diesels were good for short runs. Is that not so? My daily commute is five miles each way. I ask because I am tempted by a Freelander 2. There’s...
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  A car for someone with back injury? 1 Sep 2015 (Ask HJ)
  My partner had an accident 8 years ago which resulted in a crushed vertebra. She still has pain from her injury, especially when our car goes over bumpy...
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  Do I need to disconnect a car's battery to charge it? 8 Apr 2020 (Ask HJ)
  I have a 2017 Honda HR-V. Do I need to disconnect the battery to trickle charge?
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  The Phantom Splutter 11 May 2013 (Ask HJ)
  I purchased a second hand 2008 (58) Mini One (petrol) two months ago from a private seller. Everything had been great for the first few days until the...
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  Poor fuel consumption - how do I improve? 2 Nov 2011 (Ask HJ)
  From your info the "real" mpg of the i10 is well below claims. My new i10 1.2 achieves 42 mpg on open rural roads, few stops but short (flat) journeys...
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  Is buying another diesel estate a sound investment, considering future bans and expenses? 6 Jan 2017 (Ask HJ)
  I've got an 8 year old Honda Accord EX i-DTEC 2.2 diesel estate which I like very much and is the third I've had over the last 20 years or so. I hear alarms...
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  I put petrol in my diesel car? 3 Jun 2013 (Ask HJ)
  I've put eight litres of petrol in my 2.0 diesel Peugeot 307. The car is 51 plate. The tank was in the red, I wasn't paying attention. When I noticed I...
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  How much is an MHEV battery? 12 Feb 2024 (Ask HJ)
  I'm thinking of buying a fairly new used car. Most of them seem to have mild hybrid engines, but I haven't found information on how long these batteries...
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  Why is my Hyundai i20's fuel economy so bad? 4 Dec 2016 (Ask HJ)
  My previous Hyundai i20 - four-cylinder 1.2 petrol - was capable of 50mpg with careful driving. I've since replaced it with a newer model - three-cylinder...
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  Buying a used Audi A4 diesel - should I get the EGR valves cleaned? 10 Nov 2016 (Ask HJ)
  I'm buying a 2013 Audi A4 diesel with 110,000 miles on clock. I always use Shell V Power diesel and do 30,000 miles driving a year. I intend to keep the...