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  Can I run my 1991 Scirocco on super unleaded and fuel additives? 12 Jan 2013 (Ask HJ)
  I have a 1991 Volkswagen Scirocco GTll. At present I am filling my tank with Sainsbury's Super Unleaded and adding a Millers VSPe Power Plus fuel additive....
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  Why does our Mercedes-Benz CLS 320 cut out for no reason? 10 Jun 2012 (Ask HJ)
  In May this year our 52,000 mile 2006 Mercedes CLS 320 CDI suddenly stopped without warning with the ignition switching itself off and the key rotating...
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  Garage charging excessively and not repairing the problem 30 Jan 2012 (Ask HJ)
  My X-Type is suffering excess fuel consumption and poor acceleration. My local garage stated it had two leaking diesel injectors and gave an estimate of...
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  I improved my Nissan Murano's fuel economy by 4mpg by using Shell V Power fuel. 4 Jul 2011 (Ask HJ)
  I own 2009 Nissan Murano, purchased new, where prior to running in I averaged 24 mpg. However, now that it has covered 9000 miles my consumption has improved...
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  Excess fuel consumption 3 Jun 2011 (Ask HJ)
  I've had a VW Polo 05-reg for 2yrs. I'm lucky if I get 25mpg urban and 32mpg maximum on a decent run at 60mph. It's always been same.
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  Did my Mercedes-Benz dealer alter my tyre pressures to improve fuel economy? 5 Feb 2011 (Ask HJ)
  I purchased a new Mercedes-Benz E220CDI in December 2009. In January I received a call from the dealership asking me to take the car in for a warranty...
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  I'd like an Audi A6 or Mercedes-Benz E-Class for commuting - would a diesel be problematic? 26 Aug 2010 (Ask HJ)
  I intend to change my 2001 BMW 530i Touring (73,000 miles) for either an Audi A6 or Mercedes-Benz E-Class estate. I have always driven petrol-engined cars...
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  Thirst among equals 23 Jan 2010 (Ask HJ)
  I own both a 2001 E320 CDI estate and a 2003 E320 CDI estate. The engines are ostensibly the same, the earlier one generating 194 bhp and the later one,...
• Mazda Mazda 6 (2002 - 2007) - 03 2.0 Engine cutting out - diesel 17 Oct 2009 (Forum)
  My car had a full service history up until I bought it, but when we changed the fuel / diesel filter I found it to be very, very dirty inside and was also surprised to see it was a Denso fuel filter which lead me to believe it may never have been replaced from new, maybe some of you out there could tell me more?
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  Mugger ridge 13 Jun 2009 (Ask HJ)
  Having read you letters column in last Saturday's Telegraph about pre-paying for fuel before you fill up at fuel stations, I thought you might be interested...
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  I've been accused of misfuelling a rental car - how many miles can you theoretically drive after misfuelling? 28 Oct 2021 (Ask HJ)
  I'm in dispute with a car rental provider who want to sue me for a small fortune. They allege I filled up a diesel car with petrol but some things are...
• Fuel Saving Driving Techniques 31 Jan 2020 (Forum)
    One of the downsides of engaging 'cruise control' in your car is that it is uses more fuel than allowing the driver to have full control over the throttle opening. Assuming that you are travelling at a reasonable and legal speed on a dual carriageway or motorway and that you are not 'in a hurry', then a significant fuel saving can be made by allowing the car to gently gather speed (and momentum) on each downgrade, up to say 65 or 70 mph, and then try not to further depress your accelerator on the upgrade, such that the car progressively but slowly reduces speed on the following upgrade, resulting in the speed falling to maybe 55 or 50 mph at the end of the uphill gradient.
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  Jaguar XF injector problems 11 Oct 2016 (Ask HJ)
  We bought a 2011 Jaguar XFR from a main dealer five months ago. Yesterday, the oil warning light came on and the car started blowing out smoke. It was...
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  Bought a faulty used camper van - what are my rights? 25 Feb 2016 (Ask HJ)
  I bought a 1993 camper van from a dealer. Before buying it, the seller carried out an MoT. However, within days of collecting the vehicles, we found the...
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  What's wrong with my Hyundai ix35? 5 Mar 2015 (Ask HJ)
  I have a 2012 Hyundai ix35 1.7 diesel, which is under a finance agreement. The vehicle frequently goes into limp mode, exclusively under acceleration such...
• Citroen Xantia 2.0 HDi - Citroen Xantia, Startup issues 25 Apr 2014 (Forum)
  This led me to believe that the immobiliser kicked in (for some reason) and so this cuts off power to the fuel pump and so no fuel getting to the engine. After unplugging battery, charging it up, removing shunt fuse and then banging the fuel tank (where fuel pump was), I finally got it up and starting.
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  2013 B max keeps having a timing fault, car loses power dangerous on motorways, no indications on dash, 4 times 27 Mar 2014 (Ask HJ)
  New Bmax 2013 4 times since purchase last year loss of power when using car ie suddenly 30 mph on motorway cos engine protecting itself, bristol street...
• SAAB 9-3 (2002 - 2007) - 2003 2.2 TID - loss of power 25 Feb 2014 (Forum)
  Still wont start.... Had a look round the car etc and seems that no fuel is getting to the fuel filter.... Put diesel straight into the filter and it seems to try and start easier, but wont actually start. Looks like the fuel pump. Any ideas on that? POST 3 - UPDATE Getting a tow to SarbKar in Liverpool on Thursday - £30 They will run Tech II diags - £50 What will they then do??
• Peugeot 307 2. 0 HDI Xsi 136 - PEUGEOT 307 HDI HOT STALLING? 25 Sep 2012 (Forum)
  I foolishly lent it to a friend who accidentally filled it up with petrol and then continued to drive it without realising. After cleaning the fuel out and refilling with fresh fuel the car still would not start, and even after towing to attempt to bump start it still would not start. The Cat was replaced, the injectors were replaced and the DPF filter was cleaned through with a jet wash and then with DPF cleaner.
• 2003 Saxo 1.5D - 2003 Saxo 1.5D does not want to budge... 28 Mar 2011 (Forum)
  Is there anything that I could do to, fix/examin myself with the fuel pump and injectors?? Im not affraid of getting the hands dirty aslong as i have decent advice and a guide to follow.