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  Why does my Peugeot 406 lose power occasionally? 17 Jul 2010 (Ask HJ)
  I have a V-reg Peugeot 406 HDI 110bhp with 176,000 on the clock which is well maintained. At random times it loses engine power when running and the speedo...
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  Shell V Power Nitro+ 28 Jan 2016 (Ask HJ)
  Hi John, I've enjoyed your website and insight on matters motoring for some time; we occassionally differ (I love my DSG gearbox for example) but its...
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  Rough running Focus diesel? 21 Oct 2012 (Ask HJ)
  When trying to accelerate hard in 4th or 5th gear my 2006 Focus TDCi is prone to misfiring with the resulting loss in power. At all other times acceleration...
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  Which premium diesel fuel do you recommend? 12 Aug 2012 (Ask HJ)
  I'm a bit confused as to which is currently the best fuel to use in my Volkswagen group 2.0 TDI CR engine. Could you please confirm which is now the best...
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  Which petrol should I choose? 27 Jul 2011 (Ask HJ)
  I run a Ford Mondeo 1.8 estate (Dec 2005). It has done 55,000 miles. I cover around 5,000 miles per year - much local but with 300 mile motorway journeys...
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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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  Should I used premium petrol in my BMW Z4? 8 Aug 2022 (Ask HJ)
  I drive a BMW Z4 M40i, will I benefit from using premium grade petrol such as Shell V Power?
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  maintenance 27 Feb 2015 (Ask HJ)
  Ive run my car for 4 years it has 2 oil changes and a service every year at a Nissan dealer are there any tips to keep it going another 5 years as we love...
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  Is it okay to use fuel additives? 21 Nov 2012 (Ask HJ)
  Over the years I've used Miller's Diesel Plus in our diesel cars, mainly to lubricate the injector pump rather than seeking extra performance. We have...
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  Why shouldn't I use supermarket fuel? 1 Jul 2012 (Ask HJ)
  I get the impression that you think it best to avoid supermarket petrol. Why?
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  Is Momentum premium petrol different to Shell V-Power? 12 Mar 2017 (Ask HJ)
  I've recently seen you advise using Shell V- Power because it improves performance and mpg. We don't have a Shell garage here, but we do have a Tesco station...
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  Confusion transfusion 31 Oct 2009 (Ask HJ)
  I thought I would try Shell V-Power diesel. At a Shell Garage I saw a logo in red with a V-Power sign on it and filled up from the pump showing the red...
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  Misfuelled my Hyundai i30 diesel with petrol - should I drain the tank? 27 Apr 2013 (Ask HJ)
  I got distracted this morning and put just over two litres of V-Power petrol into my Hyundai i30 diesel before I realised. There was already about a quarter...
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  Cleaning up 23 Jun 2011 (Ask HJ)
  I took my Mazda 6 (2.0 litre petrol) in for its annual service to the local dealer recently and was advised to include a new petrol additive called TuneUp...
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  Which is the best diesel fuel brand? 7 Nov 2012 (Ask HJ)
  What is the best diesel fuel brand for a Ford Focus 1.6 diesel LX 2007?
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  Is BP Ultimate as good as Shell VPower? 23 Jan 2012 (Ask HJ)
  My nearest petrol station is BP, and I have been running my Mercedes 190e 2.0 on Ultimate. Would I benefit by seeking out a Shell station and using...
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  Why won't my Honda CR-V do any better than 28 miles to the gallon? 14 Dec 2013 (Ask HJ)
  I drive a 2003 Honda CR-V with 48,000 miles on the clock. I cannot achieve more than 28 miles to the gallon. I have tried four tanks of Shell V Power and...
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  Will performance fuels fix my car's misfire? 8 Jan 2015 (Ask HJ)
  My BMW 3 Series Touring sometimes misfires and starts jerking (kangaroo style), on a trailing/light throttle about 1500rpm as though its in too high a...
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  What do you think of Esso's lower-priced premium fuels? 15 Jun 2013 (Ask HJ)
  Esso is now selling 'Super' variants of petrol and diesel at significantly lower prices than the Shell or BP equivalents. Do you have any feedback as to...
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  Volkswagen engine problems 24 Jul 2014 (Ask HJ)
  Over the years I have had a couple of Volkswagen twin charger problems. The first was a new Golf 160 TSI DSG. The car’s first 37,000 miles were problem...