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  Car runs better with less fuel 4 Sep 2012 (Ask HJ)
  My 1996 VW Polo 1.0 runs better with less fuel in the tank - any reasons for this?
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  Fuel consumption 5 Dec 2010 (Ask HJ)
  I have a Peugeot 206 2.0-litre HDi, which has suddenly started using fuel excessively. What could be the cause? It used to return approx 50mpg but this...
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  Is my Vauxhall Corsa 1.4 compatable with E5 petrol? 14 Nov 2022 (Ask HJ)
  Could you please advise if E5 would be suitable for my 2011 Vauxhall Corsa 1.4 petrol? I have been using E10 fuel but am getting problems with the engine...
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  What octane petrol should I use in my JCW MINI? 15 Aug 2022 (Ask HJ)
  What octane petrol should I use in my John Cooper Works MINI? The handbook recommends Super Plus, with 98 RON. One of the leading supermarkets sell a 97...
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  Mercedes-Benz C220 CDI (W204) blowing black smoke 24 May 2014 (Ask HJ)
  I own a 2009 Mercedes-Benz C220 CDI (W204) with an automatic gearbox. I have recently had a problem where the car is blowing out black smoke and the car...
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  Engine light on, so the dealer drained fuel! 21 Nov 2012 (Ask HJ)
  I purchased a four-month old Venture edition Mazda MX-5 with 1050 miles on clock. Test drive was okay a week before. After buying car (empty fuel directed...
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  Is it harmful to use premium fuels? 31 Jul 2010 (Ask HJ)
  My grandson is in the motor trade (a qualified technician) and is of the opinion that sole use of top grade fuel, eg Shell V-Power diesel, is damaging...
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  My Vauxhall Vectra B won't start even after replacing the fuel pump - help! 10 Aug 2010 (Ask HJ)
  My Vauxhall Vectra B cut out whilst travelling. I tried to start the car up and it wouldn't start. The engine management light and 'spanner' light flash,...
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  What fuel grade should I run my Toyota Celica on? 25 Jun 2018 (Ask HJ)
  I have a 1992 generation 5 Celica Convertible imported from Japan many years ago. I notice that when driving up an incline it seems to 'pink'. I have not...
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  Which is the best unleaded? 26 Jun 2013 (Ask HJ)
  My car requires unleaded fuel, which fuel is best to use? I realise you recommend Shell V-Power, however I do not have the money to regularly fill with...
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  Coasting in neutral - bad for economy? 9 Aug 2012 (Ask HJ)
  The Department of Transport says in one its leaflets: "Don't coast downhill or towards lights in neutral as this uses more fuel" Is this true? The leaflet...
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  Premium fuels in a small engine 23 Jul 2012 (Ask HJ)
  I have a clio 1.2Tce, in this type of engine (with turbo and compression ratio 9.8:1) can i get better mileage and performance using RON 98?
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  Jazz fuel warning 30 Oct 2011 (Ask HJ)
  Our new Jazz (March 2011) starts the warning on low fuel at about 35 miles left, I have run on zero miles left for 20 or 30 miles with no problems. Our...
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  Bio diverse 10 Sep 2011 (Ask HJ)
  I have to take you to task over your answer to the fuelling problem with the Morgan 4/4 on 27-08-2011. Whilst you may be correct in thinking that the car...
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  Should I have my 2000 Mitsubishi Shogun converted to LPG to reduce fuel consumption? 5 Feb 2011 (Ask HJ)
  I'm being offered a 2000 model Mitsubishi Shogun GLS V6 LWB 3-litre petrol model free of charge by a family member. It's a very nice car inside, and has...
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  Does the kia Sportage suffer with failing fuel filters? 20 May 2014 (Ask HJ)
  Can you tell me if failing fuel filters on the Kia Sportage is an ongoing problem?
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  Should I pay for a fuel emission service? 13 Mar 2014 (Ask HJ)
  I have just booked my Superb Estate into Skoda for a 32,000 mile service + MoT. Among other extras offered is a "fuel emission service", I asked what it...
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  What is causing my C-Max's fuel filter to block? 27 Apr 2013 (Ask HJ)
  My 20,000 mile Grand C-Max 1.6TDCI, after several transient episodes, recently went into permanent 'limp home' mode. The dealer reported that the fault...
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  Honda Civic auto not as efficient as we'd hope 19 Feb 2013 (Ask HJ)
  I was always under the impression that new cars had better fuel consumption than older ones. I recently bought a new model (second hand) Honda Civic 1.8...
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  Fuel tank size 2 Oct 2010 (Ask HJ)
  Is the actual fuel tank capacity usually that given in the owners manual or is it fact larger to give one a margin before running out of fuel? This a question...