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• Peugeot 205 (1983 - 1997) - 93 1769 non turbo diesel, Water in fuel light 1 Feb 2009 (Forum)
  Every so often the water in fuel light comes on. This has been happening for the last 4 years and when it started I took out the tank and drained it twice....
• Why be bothered about fuel consumption? 5 Oct 2005 (Forum)
  I was wondering why people get so worried about fuel consumption and less concerned about other costs for the car that negate any saving? It seems a lot of people buy a diesel but dont think about either depreciation or cost of servicing, or just other general running costs.
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  Should I get a petrol or diesel SUV? 20 May 2020 (Ask HJ)
  Should I get a petrol or diesel Porsche Cayenne? Will a diesel be hit with bigger taxes from the Government? I do 15,000 miles a year.
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  Petrol in a diesel tank 10 Nov 2010 (Ask HJ)
  I put in 26 litres of petrol in my 2.7 S type diesel Jaguar. Having realised this I then filled up to the tanks capacity (about 66 litres)with diesel....
• more diesel 9 Jan 2003 (Forum)
  I have a 2001 115 pd golf. Recently had a new change over valve fitted under warranty. fuel consumption has gone up by 15% on like for like journeys dealer...
• Running diesels on vegetable oil 22 May 2004 (Forum)
  I've heard that it is possible to run diesel engines on vegetable oil, but that additives are required. What are the additives? Does it affect the engine life? Is the fuel economy as good as it would be on diesel? This is for a Kubota lawn mower.
• Diesel fuel filters, changed too often? 7 Jan 2016 (Forum)
  With due apologies for touching on this topic before,I have cut another fuel filter open for examination. I have suspected for a long time that diesel fuel filters have an easy life using normal pump fuel. Drained and `opened` the canister type fom one car at the service yesterday, it was clean inside and not one drop of water.
• vauxhall corsa 1.7 Cdti ecoflex sri vs 1.3 version - Best for fuel efficiency diesel corsa 2 Sep 2014 (Forum)
   I am looking to buy a new or fairly new corsa. Changing from a 1.2 petrol 2008 design to diesel.  I drive mainly motorway and also some...
• Ford Mondeo IV (2007 - ) - Diesel recommendations in the owner's manual 5 Mar 2008 (Forum)
  I was browsing the owner's manual for the new Mondeo (like you do), and came across the fuel recommendations. It was surprisingly open, saying that any diesel that meets the EN590 standard is fine. Also 5% biodiesel is fine too. I would have thought after all the hoo-ha from dealers about "quality fuels" for the latest-generation common-rail motors, the manual would be more specific than that.
• Diesel Engines 27 Feb 2003 (Forum)
  As a converted diesel user could someone explain why on new family sized cars the turbo-diesel car costs approx. £1000 more than the petrol equivalent. Also why are we the only Country in Europe where diesel fuel costs more than petrol.
• HGVs and Premium Diesel 3 Aug 2016 (Forum)
  Assuming all the benefits of using a 'premium' diesel are accepted, why don't HGVs use it?  HGV's at my local Shell fill up at their dedicated 'Fuel Save' pumps.    
• V40 diesel MPG 20 Sep 2003 (Forum)
  Could anyone tell me what fuel consumption I could expect from a Volvo V40 diesel - not sure whether it's the common rail. Thanks,
• All makes and models - Possibly the end of the fuel debate? 20 Mar 2017 (Forum)
  Asda is middle of the road diesel, but he said any modern diesel car should stay away from supermarket fuels apart from tesco and use either BP ultimate or Shell v power or equivalent as they need the extra dose. Was a very interesting conversation, I wont bore you all with the rest but perhaps one step closer in the debate.
• Mazda Mazda 6 (2002 - 2007) - 2.0 diesel -fuel warning light and remaining miles 10 Dec 2007 (Forum)
  I have had my Mazda6 2.0 diesel since late October. This week I let the fuel run lower than usual before re-filling (waiting for my fuel card but that's another story)... ... so it had got down to below a quarter of a tank with the "miles remaining" readout heading to single digits.
• Hyundai ix35 - Hyundai ix35 fuel filter issues in cold weather 24 Jan 2019 (Forum)
  Are you aware of fuel filter issues in cold weather? My car (12 reg/25,000 miles) lost power and then came to an abrupt stop when driving in cold weather conditions (2 degrees C). The dealership advised that the fuel filter had clogged due to the diesel fuel used.
• Fuel price 11 Nov 2021 (Forum)
  Saw diesel at £1.68 a litre at Fleet services yesterday....ouch. Remember queuing up to buy petrol when it went up to 50p a gallon. 
• Emptying fuel tank (306) 4 May 2006 (Forum)
  Is it possible to do this? Nope, no misfuelling ;o) I'm selling the thing, and currently have £50 worth of diesel in the tank!
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  Fuel contamination - how did it happen? 26 Oct 2013 (Ask HJ)
  I am totally mystified as to how my diesel Ford Mondeo got contaminated with petrol. Last week I filled up with diesel at my local supermarket and drove...
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  How can fuel pumps be improved to prevent misfuelling? 19 Jan 2013 (Ask HJ)
  I know it is my fault, but I filled my diesel Mercedes-Benz car with petrol, and landed myself with a bill for £730. Amazingly, the car travelled 75 miles...
• Aircon, Diesel or Petrol? 8 Jun 2002 (Forum)
  When using aircon, will more fuel be used on a similarly powered petrol or diesel? For example; the Peugeot-Citroen 1.8 117 bhp 118 lb/ft petrol and the 2.0 HDI 110 bhp 184 lb/ft diesel?