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• Premium diesel + cleaners 8 Jun 2006 (Forum)
  Just finished a test on my car after running the Redex Gold diesel injector treatment through it. With 40 litres of cheap 'n' nasty Esso diesel in followed by 20 litres of BP Ultimate, the fuel economy went from 44 to 51mpg. I was exceptionally sceptical so am continuing to test with cheap diesel to see if the benefits last.
• Dodgy diesel on TV tonight 1 Nov 2002 (Forum)
  Anyone see the report on dodgy diesel ? One shot showed a fuel pump selling diesel suspiciously cheaply,i.e. 72.9 p per litre. I`ve just filled up on the A414 with diesel 4 or 5 or 6 pence per litre cheaper than "normal". It was wearing Shell logos everywhere so I should be safe.Shouldn`t I ???????
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  What is the emissions situation on larger and thirstier diesel engines? 25 Sep 2015 (Ask HJ)
  With all the current hype about diesel cars, the fact that all commercial transport is oil fuelled seems to have been overlooked. What is the emissions...
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  I put a small amount of petrol in my diesel car? 4 May 2013 (Ask HJ)
  I recently put 0.4 litres of petrol into my Audi A3 Sportback TDI 170 Quattro. I then put over 50 litres of diesel in. After 220 miles, I filled up with...
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  Why does diesel drain into the sump on cars with a clogged DPF? 9 Feb 2013 (Ask HJ)
  I read that you stated that modern diesels are unsuitable for successive runs from cold, which I fully comprehend, but how does diesel drain into the sump...
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  Which used diesel estate? 23 Apr 2012 (Ask HJ)
  I am looking for a used (1 year old) estate. My budget is £16,000. My options are either a Mazda 6 2.2D (163PS) TS2 or a Toyota Avensis Tourer 2.0D D-4D...
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  Diesel, petrol or something else? 15 Jan 2011 (Ask HJ)
  My job involves lots of small stop/start journeys (40-50 per day), sometimes only driving a few hundred yards, sometimes a couple of miles and I am using...
• Drop in fuel price 29 May 2005 (Forum)
  Filled up with Shell diesel today and noticed a drop ( from Tuesday) of 3p per litre...down to 85.9 from 88.9. Has the barrel price of oil dropped or...
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  Which estate cars offer the best fuel economy? 22 Jun 2020 (Ask HJ)
  What’s the most economical diesel, estate?
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  Terrible fuel consumption on the Vauxhall Meriva - is this right? 8 Mar 2013 (Ask HJ)
  I am thinking of buying an auto diesel Vauxhall Meriva, but the consumption in your real mpg list is very high. Is this report the result of lots of drivers...
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  Will a 1997 SEAT Alhambra be more economical than our R-reg Ford Galaxy? 10 Jun 2010 (Ask HJ)
  I own an R-reg Ford Galaxy GLX, 2-litre. I want something a little cheaper to run, as I do two one-and-a-half-hour school runs a day through town. Will...
• Volkswagen Passat (1988 - 1997) - 96 1.9Tdi air bubbles in diesel fuel pipe 5 Feb 2009 (Forum)
  I seem to have given myself another problem I changed the fuel filter as procedure in Haynes manual but did not prefill the canister with fuel- not mentioned...
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  Peugeot 407 running rough 6 Mar 2012 (Ask HJ)
  I have had my Peugeot 407 2.0 Diesel for 2 years now, and every 5-600 miles, the engine develops a misfire, as if it is being starved of fuel for a second...
• Peugeot 406 td poor fuel economy 27 Jun 2013 (Forum)
  I have recently purchased a 406 1.9 td, 60,000 miles full history, have just fueled up & the car has covered 336 miles for £40 in diesel (32 mpg) i am informed it should be averaging near 40 mpg? Any advice/help would be greatly appreciated.
• vauxhall vectra c dti - vectra dti fuel problem 6 Apr 2012 (Forum)
  still got problems with my 2.0 dti using alot of fuel . i put £10 of diesel in and got 43 miles on a run have serviced it and changed vacuum pipes , could it be coolant temp sensor and thermostat or injectors , temp gauge sits at 80 - 85 
• Mitsibushi L200 - Fuel Filter Replacement 28 Oct 2010 (Forum)
  How do I disconnect the wiring to the Diesel fuel filter,Is the whole job difficult, My son is a self employed Carpenter and fallen on hard times, he has been off work 12 weeks on from injury and getting £65, per week , I am trying to save him a garage bill,     
• 50% Fuel saving-Hydrogen from soda water kit 2 Sep 2008 (Forum)
  Not sure if this topic has been discussed before, but for a £349.00 kit www.convertnow.co.uk claim to give 50% fuel savings on petrol and diesel engines. Anyone know of an indepenent test for this? Any harmful effects on the engine? Is this another case of snake oil? Has anyone on this forum tried it?
• Sedona LX 2902cc 16v manual diesel, on a '52 plat - Kia Sedona: Intermittent Massive fuel leak 21 Jul 2017 (Forum)
  The problem is a major fuel leak. If I start the car from cold and look underneath - no leak.  Drive to the shop and back - no leak.  Drive...
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  Why has my Audi A4's fuel tank contracted? 4 Jul 2012 (Ask HJ)
  I have just had my Audi A4 serviced and the mechanic tells me that the diesel tank is curved inwards on the bottom underside as if it has been sucked in....
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  My Ford Focus won't start 18 Mar 2012 (Ask HJ)
  My Focus will not start at all and displays the error code P0251. Changed the fuel pump and a diesel specialist checked injectors. Confirmed in good condition....