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  Fuel consumption in winter 20 Feb 2012 (Ask HJ)
  Hi can you tell me if diesel engines use more diesel in the cold weather? My economy has dropped from 55mpg in the warm weather To 46-47 Mpg in the winter.
• Diesel cars in the US 21 Aug 2009 (Forum)
  Does anyone work with cars in cold countries or test them? Could an additive be added easily like FSII in aircraft fuel? I think diesel and aircraft fuel are fairly similar. I've driven a few diesel but nowhere really cold.
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  Which estate is best? 13 May 2014 (Ask HJ)
  Which is better as a used car for £15,000: a BMW 5 Series or a Volkswagen Passat for £15,000? Also, should I buy a petrol or diesel?
• Diesel waxing 19 Jun 2007 (Forum)
  Do the fuel companies still alter diesel at the refinery, according to season, to avoid the waxing that used to plague HGVs?
• Ford Kuga - Wrong fuel nozzle preventer and re-fuelling in Fra 13 Aug 2011 (Forum)
  Are there any problems using French diesel fuel nozzles in the Ford wrong fuel preventer fitted to many recent Ford cars?
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  Can I get a remap to improve the fuel economy of my Kia Cee'd? 9 May 2017 (Ask HJ)
  Based on your advice and all you've written, I bought a Kia C'eed estate auto 1.6 diesel (no DPF) with 37,000 miles on the clock from a Kia dealer this...
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  Independent forecourts are leading the way on ‘fairer’ fuel prices 25 Jul 2022 (News)
  
• Land Rover Range Rover Sport - how to drain the fuel tank 1 Sep 2014 (Forum)
  How can the wrong fuel be drained from the diesel tank ?
• VW 1997 1.9 Polo - Diesel motor surging 12 Jan 2013 (Forum)
  I can feel something just go klunk and the surge is unmistakable, lovely power but short lived.  My car is a non-turbo job, I have replaced both the air and the fuel filter recently. Is there a fuel filter anywhere else other than the main filter under the bonnet? perhaps on the fuel pump or ??? ANY SUGGESTIONS PLEASE IvorSmallFaucet in Sunderland 
• Capping diesel price - today's HJ 12 Aug 2008 (Forum)
  Am I wrong? One answer might be to cap the tax take as a proportion of the new fuel sale price. HMG is taking much more in fuel tax this year than last.
• Peugeot 307 (2001 - 2007) - 04 1.6 bleeding fuel system 25 Oct 2009 (Forum)
  As a result of a problem with the power output of my car { not going into the turbo } I replaced the air filter and fuel filter, the car wont run now , but was starting fine prior to this. I have primed the fuel filter and the filter has definately got diesel in it. After attempting to start it by towing it as the battery is now flat, there is pressure in the system if I release one of the pipes off the filter.
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  Will it cost more to own a used diesel car? 12 Nov 2018 (Ask HJ)
  Will it cost more to own a used diesel car?
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  Is it true that diesel engines are unsuited to mainly short journeys? 2 Aug 2017 (Ask HJ)
  Is it true that diesel engines are unsuited to mainly short journeys?
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  Fuel delivery problem with BMW 3 Series 30 Sep 2014 (Ask HJ)
  My BMW 3 Series E46 is running poorly, The engine appears to be uneven in its power delivery and feels like the diesel isn't getting through. Any ideas?...
• Ford Mondeo IV (2007 - ) - Poor Fuel Economy of 2.0 TDCi with DPF 4 Oct 2009 (Forum)
  If you are thinking of buying a Mondeo diesel for its fuel economy, think again. I have just bought a new 2.0 TDCi Titanium X Estate fitted with a DPF, which will not achieve more than upper 30's mpg. The DPF has had an effect on fuel economy, so if you want a Mondeo IV diesel to get more MPG, at the moment it is best to go for the 1.8 TDCi which does not have the DPF as standard.
• Diesel fuel consumption 9 Aug 2008 (Forum)
  Yes, it's me again with my 07/56 320d... Tech question(s) related to the 'swingometer' instant fuel consumption gauge: I'm driving along at a steady speed...
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  The generator game 28 Aug 2010 (Ask HJ)
  Why are hybrid cars petrol and electric? Would it not make it more economical on fuel to have diesel/electric hybrids?
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  Do the car manufacturer's have their misfuelling prevention devices backwards? 15 Dec 2012 (Ask HJ)
  I think the motor industry has got it the wrong way round in its effort to prevent misfuelling. It is impossible to put diesel into a petrol tank but this...
• Chrysler Grand Voyager 2.8 Diesel - Vehicle will not start 25 May 2015 (Forum)
  My car sudderly started playing up on starting yesterday, needed churning over for long period befor firing up but then run absolutly fine. Today will not start at all. Have plenty of diesel  and fuel filter was chaanged less than 1K miles ago. I dissconnected fuel supply from inlet manifold heater and turned engine over, plenty of fuel coming thro line. Vehicle has only done 62K miles so guess injectors do not need changing, anyway this is so sudden.
• Diesel *fuel* engine flush oil light on 24 Apr 2007 (Forum)
  Using diesel fuel as a flushing oil, outcomes? I`ve heard about it for years and have always been horrified at the thought of the camlobe pressures (etc) when Derv is used as a flushing oil. But on another forum, someone has just run a petrol engine for 30mins at tickover on derv instead of engine oil with the oil pressure light on the whole time.