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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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  What's the most effective way to clear a DPF? 21 Apr 2025 (Ask HJ)
  Motoring magazines often refer to taking the car for a fast run to clear the DPF. Surely a better way would be to drive in 4th or 5th gear with increased...
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  Which is cheaper to run, a hybrid or an EV? 22 Sep 2023 (Ask HJ)
  Which is the cheapest fuel cost, a hybrid doing 66 mpg or a full electric car?
• 4 diif makes - Electric car range 4 Apr 2023 (Forum)
  Hello One and All,                         I hope all is well with you, I have just watched a video with Mat Watson who has driven 4 cars ( himself plus 3 others ) until they stop, average range was about 288-324 miles, Claimed range was 72-82%.   It came to light while watching this that the fuel cover on 1 of the cars was electronically operated, and with zero power he had no way of getting it open to be able to charge the car up.   While you would never run a car until it stop, and to be honest they all had fair warning from the car to find a charging point, it never occurred to me that this would be an issue, I also question why they would do it in the first place since the whole point of having a secure cover on the fuel tank is to prevent people from stealing fuel from your car.
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  Many years ago I purchased two jerry cans and filled them with diesel - is the fuel still okay to use? 15 Jul 2019 (Ask HJ)
  During the last fuel scare many years ago I purchased two jerry cans and filled them with diesel. The cans have not been opened. Is the diesel in them...
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  Will fuel stored in a metal cannister for two years still be okay to use? 5 Dec 2018 (Ask HJ)
  I keep 10 litres of unleaded petrol in an approved metal cannister in my car boot for emergency use. As I keep my tank topped up, the contents of the can...
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  What lead additive can you suggest for our 1977 MG Midget? 12 Feb 2018 (Ask HJ)
  We have a 1977 MG Midget owned from new with 45,000 miles on the clock. The engine is original and we've been using Castrol Valvemaster Plus additive....
• "Fuel poverty" 3 Feb 2018 (Forum)
  Item on the TV news last night saying 100,000 people in the region were in "fuel poverty". I don't dispute that some find it hard to heat their houses to the temperature they would like, but these days I think expectations in this regard, as in many others, can be unrealistic.
• Developments 20 Mar 2017 (Forum)
  There is a very interesting article in the IEEE Spectrum magazine about the future of hydrogen fuel cells as applied to motor vehicles.   The author is based in California, where the authorities take pollution seriously and support the motor industry in its attempts to solve the problems.   It seems that you can buy or lease several models of cars that are fuel cell driven, made by leading manufacturers including Honda, Hyundai and Toyota.
• Peugeot 307 SW - 1.6 petrol - won't start 22 Dec 2016 (Forum)
  After finishing that I ran the engine for a few minutes, since then i didn't try to start it until this morning (2 days later). I used to have an Astra where if you parked it on a slope when the fuel was near empty the fuel would flow away from the pump and it wouldn't start. Could something similar be happening here? The car is on level ground with 1\2 a tank full though. Or could I have disturbed something while working on the exhaust?
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  Vauxhall Astra engine management light - what does it mean? 9 Nov 2016 (Ask HJ)
  I need to sell my 2006 Vauxhall Astra, but the engine management light stays on all the time. It was mentioned on the MoT advisory, but it passed anyway....
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  VAG EA189 emissions defeat software fix - seen this update? 29 Oct 2016 (Ask HJ)
  Have you seen this? The EU are worried about VW's fix. Reuters: EU fears VW diesel fixes could damage engines: Spiegel. http://google.com/newsstand/s/CBIwlYulmDA Keep...
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  Real MPG and real emissions 10 Oct 2016 (Ask HJ)
  Some friends are looking to change car soon. They are obsessed with emissions issues and look for low MPG cars with low carbon. Their current car (Smart)...
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  Peugeot Boxer fuel pump failure 8 Oct 2016 (Ask HJ)
  I need help with my Peugeot Boxer camper van. The vehicle is a 2008 model and has a full service history. In brief, the high pressure fuel pump has failed...
• Citroen C5 - Diesel stalls when slowing to a stop or idling 21 Jul 2016 (Forum)
  It's been in to the garage 3 times, and we've had the AA once - we've spent almost £3,000 so far (!!!) and the fault is still there. So far: Garage 1, Visit 1: fitted 4 new fuel injectors and serviced the car. Two days later, an engine warning light came on and the car started stalling again. Garage 1, Visit 2: replaced the EGR valve and checked the engine fuel recycling system.
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  Which SUV is most economical? 2 May 2016 (Ask HJ)
  We currently have a 2015 automatic Mitsubishi L200. The fuel consumption is awful (max 30mpg). I do around 20,000 miles per year and would like something...
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  Panda Twinair - Are they fun to drive? 13 Apr 2016 (Ask HJ)
  I currently have a Fiat Panda 1.2 with 60PS and it's great, but I'm looking for a newer car. Having read all your reviews on small city cars, I've found...
• berlingo 2.0 hdi 2004 - intermittent fault. 2 Apr 2016 (Forum)
  one mechanic said 'might need new fuel pump' whic i doubt as it runs so well. i also doubt a fault in the fuel regulator as it runs so well at all speeds.
• 2007 ford ranger 3.0 diesel auto - Fird ranger Cuts out and will not rev by 2000 rpm 9 Jan 2016 (Forum)
  Had this vehicle 5 years and it has always been sensitive to fuel filters. It will cut out but always restart immediately then run for another few miles before it happens again, this can also happen going around left hand sharp bends. It also only runs properly if the fuel filler cap is not tightened fully, always assumed the breather is blocked but not a major issue.
• mpg - who is to blame? 4 Oct 2015 (Forum)
  The Consumers’ Association (Which?) seem to have taken a stance on car fuel consumption and emissions. In articles, campaigns and petitions the implication seems to be that the difference between “claimed” figures and “real life” values is down to car manufacturers .