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  Supermarket fuels - are they that bad? 11 Nov 2011 (Ask HJ)
  Does your advice regarding the use of supermarket fuels still stand? I understand that you recommend the use of premium fuels (diesel in my case) as opposed...
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  Do premium fuels de-coke turbochargers as well as injection components? 9 Sep 2010 (Ask HJ)
  This is a very important question as many vehicle owners suffer sticking vanes in turbochargers due to carbon build-up, which is very expensive to fix....
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  Taken to the cleaners 5 Oct 2011 (Ask HJ)
  Could you please expand on your apparently disparaging reference to supermarket petrol as a contributory cause of lambda sensor failure?
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  Should I use a premium fuel in my Honda Civic Hybrid? 1 Aug 2010 (Ask HJ)
  I have a Honda Civic Hybrid (07). Do you think using a more expensive petrol would be better for my car than normal fuel?
• VWgolf MK V - diesel losing power 27 Apr 2010 (Forum)
  Asked for some advice a few weeks ago on this issue. Had the car into the garage and they told me the diagnostics indicated that the turbo boost switch...
• Any - The old argument, Supermarket Fuel v Premium Fuel 18 Jan 2025 (Forum)
  As we have seen discussed many times on this forum, the old argument is Premium Fuel (V power etc) worth it, is there a big difference etc. Well I wtched this video earlier from James Martin JayEmm who got a fuel expert on to explain... I found it very informative, worth a watch. Link below.
• BP Ultimate Diesel v Shell ? 23 Apr 2007 (Forum)
  The local BP station is changing to Shell, I used to find Shell and Texaco diesel better than most though have mainly been using BP Ultimate for some while now due to the convenience of the local filling station. Shell V-Power diesel is not nationally available though perhaps they will sell Shell Diesel Extra, which one is the equivilent of Ultimate these days? Perhaps I should go back to standard diesel + Millers?
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  Is the automatic Honda CR-V any good? 3 Nov 2016 (Ask HJ)
  On the current Honda CR-V petrol, you indicate that the automatic gearbox is best avoided. What is your reason for this advice? Is the gearbox CVT or torque...
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  Is leaking power steering an MoT failure? 27 Jan 2025 (Ask HJ)
  Is a leaking power steering rack an MoT failure?
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  Temporary loss of power 28 Nov 2015 (Ask HJ)
  My BMW 116i has a temporary loss of power when accelerating in first and second gear (between around 1500rpm and 2000rpm). It feels as though the turbo...
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  What's the best quality petrol and diesel to use? 2 Aug 2018 (Ask HJ)
  What is the best premium fuel brand for petrol and diesel?
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  Should I add injector cleaning fluid to my BMW 5 Series? 30 Oct 2014 (Ask HJ)
  Should I add injector cleaning fluid to my 2007 BMW 525d diesel engine?
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  Can a fuel additive void my car's warranty? 7 Mar 2014 (Ask HJ)
  Could a manufacturer withdraw their warranty if a fuel additive product is used?
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  Who’s fuelling who? 29 Dec 2012 (Ask HJ)
  I always find V-Power fuel to be really good on engine of all the fuels that I have used over the years. Does this mean using supermarket fuels result...
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  How can I prepare my Jeep Cherokee for a long drive with a caravan? 29 Sep 2012 (Ask HJ)
  I used to use my 2004 Jeep Cherokee 2.8 CRD Limited to travel backwards and forwards from Exeter to Manchester. More recently we use hire cars, so the...
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  Supermarket or premium fuel for my first car? 5 Jan 2012 (Ask HJ)
  I've just been given my first car - a 1998 Ford Fiesta non-turbo diesel. I'm the fifth owner. My dad says that I should always stick the best fuel possible...
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  Would I benefit from higher-grade petrol? 4 Oct 2015 (Ask HJ)
  I have driven a BMW E30 318i automatic from new which I had converted to run on unleaded petrol when leaded petrol was phased out. I currently always refuel...
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  Is supermarket fuel inferior to petrol station fuel? 30 Nov 2013 (Ask HJ)
  It was recently suggested to me that fuel obtained from supermarkets is inferior to that obtained from filling stations and service areas and is “diluted”...
• Optimax is History! 8 Sep 2006 (Forum)
  Shell launches V-Power 99 RON unleaded fuel. Looks like Shell are replacing optimax. http://tinyurl.com/ofm59
• Snake oil that seems to work! V Power + Nitro 5 May 2017 (Forum)
  I've used the odd tank of premium diesel for years but since the VW scandel I've used more of it and for the last few months nothing but V Power+Nitro diesel. Over time a couple of things have changed. Firstly my DPF is not doing any active regenerations, none in 2500 miles, this is my third DPF car so I know the symptoms. My driving has not change and most of the miles were in cold weather when its usually at its worst.