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• mondeo diesel 2.0DI (115bhp) 23 Feb 2002 (Forum)
  Has anyone else bought a new Ford Mondeo diesel 2.0DI (115bhp duratorq engine) and been disappointed with the fuel return when compared with the fuel returns quoted in various magazines and websites? I've done about 4,000 miles in mine from new and and getting a return of 35.5mpg all the time whether I am driving in towns or on motorways.
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  Should I get a petrol or diesel if I do 10,000 miles per year? 30 Oct 2020 (Ask HJ)
  I'm looking at a year old Skoda Superb Estate. I previously would have bought diesel but DPF issues make me nervous about that. I’d buy petrol but the...
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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...
• C-MAX Diesel Auto 26 Jul 2006 (Forum)
  Does anyone know if the C-MAX 1.6TDCi 109PS with the CVT auto is any good? If not, can anyone think of any other diesel automatics that offer good fuel consumption within the same sort of price range? Interior space is also a priority.
• Was diesel cheaper than petrol 28 Aug 2003 (Forum)
  Is it my imagination, but did diesel used to be cheaper than petrol in summer and slightly more expensive in winter when people bought heating oil? I was looking forward to cheaper fuel in summer. Oh well. On my 3rd Citroen. Saxo, Xsara, C5.
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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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  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...
• Mazda 2 1.6d Sport - Diesel Engine Maintenance 1 Dec 2021 (Forum)
  Having bought a diesel car this week which is 9 years old and has about 66k mileage i was wondering what people's thoughts are on looking after the engine, is it worth adding fuel cleaners occasionally when i fill up? Is Shell Diesel really better quality and better for the engine than supermarket diesel?
• SEAT - Morrisons new bio-diesel 12 Jan 2009 (Forum)
  I was at a SEAT dealer the other day and there was a new notice saying if you use the newest type of Morrisons bio-diesel you will invalidate the warranty on your fuel system, including various bits of the engine. The notice said this new diesel contains 30% (I think that was the proportion) of bio diesel (mixed in with the regular stuff) which was not compatable with the engine.
• Turbo diesel or not 27 Oct 2008 (Forum)
  I'm looking for a s/h diesel, I see a lot of turbo versions and I'm giving them a miss as I have the idea that they are not as economical. Given the equivalent engine size and car is this correct? As far as I'm concerned the whole idea of owning a diesel is for economy bearing in mind that diesel fuel is about ten pence more per litre, a turbo might not be any cheaper to run than a petrol vehicle.
• 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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  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...