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• Vauxhall Cavalier (1988 - 1995) - (88-95) 1.7TD - Can I mix Bio Fuel and diesel? 11 Jan 2008 (Forum)
  I have a diesel car (Isuzu engine) which previous owner ran on bio fuel.is it ok to refill with diesel when bio fuel is still in tank {before anyone asks what car and engine, I've found the details via a forum search.
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  Do diesel engines use more fuel in Winter? 24 Feb 2012 (Ask HJ)
  Can you tell me if diesel engines use more fuel in winter?
• Nissan Qashqai (2007 - ) - Petrol v Diesel - fuel consumption/CO2 discrepancy 14 Jan 2010 (Forum)
  Not only does it seem odd that a diesel engine of the same size as the petrol verison emits more CO2, but to manage that whilst demonstrating better fuel consumption seems contradcitory. Am I missing something here?
• 2001 fiesta 1.8tdi (DI engine) - wont start after replacing fuel tank. 21 Jul 2010 (Forum)
  I have replaced the diesel fuel tank in a mk5 fiesta TDi as it had a hole it and failed the MOT. The fiesta is now refusing to start. I tried to bleed the fuel system by filling the fuel filter with diesel and loosened the injectors nuts one at a time while turning he engine over to try get all the air out.
• Diesel Fuel Filters 6 Jan 2002 (Forum)
  When is the best time to replace filters. Should it be done once a year or twice. My motoring is short stop start
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  Peugeot 205 fuel fault 7 Jul 2011 (Ask HJ)
  I have a 1991 Peugeot 205 diesel it ran out of diesel filled up with 10 ltres filled up perflux filter canister and pumped it emptied filter can but will...
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  Premium fuel - is it worth it? 6 Sep 2011 (Ask HJ)
  For some time you have suggested that using Shell V Power unleaded is well worth the extra cost due to general improved performance and mpg. As Shell...
• Mazda Mazda 6 (2002 - 2007) - Diesel fuel filter replacement 21 Oct 2009 (Forum)
  Looks like I've got to service my Son's Mazda 6 diesel this weekend, so i need to know if and how i bleed the system after changing the fuel filter. Is it self bleeding like my Peugeot or is there a bleed screw I need to undo? Many thanks in advance Robin the Technician
• Renault Laguna III "ltr Diesel Auto - Shell V-power verses BP Ultimate 11 May 2011 (Forum)
  Saw this topic but could not find a recent post.  Anyone got any ideas if the diesel fuels above are any better than ordinary diesel fuels ?
• n/a - Petrol/diesel can be hard to find in France. 30 May 2016 (Forum)
    Best advice is to fill before you get on the ferry and top up as you go in France wherever you can find fuel on your journey. Diesel is the first fuel to run out at fuel stations, about 70% of cars are diesel over here. UL95 seems to be more readily available The shortages have been worse in the north and north-west but are spreading south.
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  Fuels unto themselves 5 Oct 2011 (Ask HJ)
  In your column on Saturday, October 8th you made mention of supermarket petrol. What is wrong with it? And is diesel affected as well?
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  Why is my Focus leaking diesel? 28 Jul 2014 (Ask HJ)
  I have a Ford Focus 1.6 Diesel (2012) which occasionally drops fluid over my driveway. Initially I thought this was oil, but after a service they could...
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  Mazda diesel engine problems 9 Jan 2013 (Ask HJ)
  I have fitted an 2004 2.0-litre diesel engine to my Mazda 6 after the big ends went. Both engines have same engine code. I have now got what seems to be...
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  Fuels and their money 7 Aug 2010 (Ask HJ)
  My 5-year-old Rover 75 Connoisseur SE CDTi diesel has covered 29,000 miles and will average 48 miles per gallon on a long run dropping to 43 on short runs....
• Any - Costco Fuel 29 Sep 2019 (Forum)
  Not wanting to start another supermarket vs branded fuel debate, but I’ve just fuelled up at Costco for 123.7 per litre for their Premium Diesel. I’ve no idea if there is a legal definition of what is premium so far as fuel is concerned, but it’s still 4p per litre cheaper than my regular Tesco diesel.
• Kia rio - Fuel economy takes a hit after servicing 21 Mar 2010 (Forum)
  I was wondering if other diesel drivers have noticed that after a service the fuel economy takes a hit. I would imagine that the oil has better lubriacting properties after it has carbonised a bit and that the new fuel filter would have an initial bit of resistance to fuel flow.
• Diesel and Water contamination 21 Mar 2002 (Forum)
  Would any water residue, however small, remain in this recovered diesel? Would it be enough to damage an engine/fuel pump of a VW TDI ?
• USA wakes up to diesel cars ? 9 May 2007 (Forum)
  Diesel vehicles achieve fuel mileage superior to hybrids, and are popular in Europe where fuel is very expensive. Five states led by California prevent the sale of diesel cars through strict emissions regulations.
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  Cost of fuel 4 Feb 2011 (Ask HJ)
  Looking at the AA comparison site, 23 out of 28 countries have cheaper diesel than petrol, and the average cost of diesel works out at £1.03/litre (1.22...
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  How can I tell whether a hire vehicle is petrol or diesel? 17 Nov 2012 (Ask HJ)
  We hired a Ford Focus last week but were concerned when we came to refuel the car. On opening the fuel inlet there were signs for a black fuel pump, i.e....