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  I like the new Mondeo - what's the best engine choice for a 60-mile each way motorway commute? 9 Aug 2016 (Ask HJ)
  I like the new Mondeo and want the best engine choice for a 60-mile each way motorway commute. The 1.5 TDCi ECONETEC offers best fuel economy, but Ford...
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  fuel grades 15 Jul 2015 (Ask HJ)
  I use Shell Nitro unleaded in my M4, what is the equivalent grade for Esso, BP and Texaco please (on the assumption that I cannot find a Shell station)?
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  Why won't my car achieve its official fuel economy? 16 Feb 2015 (Ask HJ)
  I recently bought a Mercedes-Benz E-Class Estate (220CDI Blue Efficiency) and done 3000 miles. However, I cannot get much above 46mpg, which is a long...
• Ford Focus 09 Tdci - Fuel leak (spraying diesel) 14 Feb 2015 (Forum)
  I noticed a slight smell of diesel a couple of days ago, around my car and I dismissed it as some spilt fuel from the petrol station. It's gradually got worse and is now coming through the vents and into the car. I had a look under the bonnet tonight after work tonight and although there was no obvious signs of a fuel leak on first inspection, after I'd started the engine and put my foot on the accelerator a big cloud of diesel proceeded to spray up and over the engine block.
• LPG Problems 14 Dec 2014 (Forum)
  After a further 24,000 miles the same fault has developed with exactly the same consequences. If LPG is such a clean fuel, why should the fuel distributor become blocked and, if the cause of the fouling is carbon deposits as suggested by the garage, why isn't the petrol performance affected as well? The only other suggestion I have had is that there is a small air leak in the LPG fuel system causing the fuel mixture to be too lean to support combustion.
• Mondeo 1.8 TDCI 2009 - Diesel Knock & Judder 4 Apr 2014 (Forum)
  I have had the fuel filter changed and a new fuel pressure regulator fitted but is still the same, acceleration is very good and fuel consumption is also good, I have found the car runs a little better on a better grade of fuel.
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  Running-in a new car - what fuel should I use? 28 Feb 2014 (Ask HJ)
  Assuming that BP Ultimate or Shell V-Power diesel is not readily available (I am going abroad), do you recommend the use of Millers Diesel Power Plus during...
• Merc Vito 110 CDI - P1187 Code: What next? 12 Dec 2013 (Forum)
  Diagnostics originally only showed glow plugs which were replaced and relay unit replaced. Still cut out over 3000rpm. New diagnostics gives P1187 error code. Just changed fuel filter, which hadn't been done for over a year. Could that be it? Please say yes! Mechanic suggests could be fuel pressure sensor, fuel pressure control valve, fuel pump or injectors. Please could you advise where to go from here?
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  Why is my van running poorly? 6 Oct 2013 (Ask HJ)
  My 2007 Peugeot Expert van is running very sluggish. The problem is at its worse when running at a constant speed, with the van backing off then speeding...
• VW Golf MK4 - Smell of fuel when fan is on 3 Sep 2013 (Forum)
  I can smell fuel when I have my fan on in my MK4 Golf. My air conditioning unit has be broken for about 12 months which didn't bother me. But over the summer with the hot weather I have had to have just the fan on circulating air around the car.
• Fuel price thread 25 Feb 2013 (Forum)
  Apologies again: I am a reluctant censor, and it's only a very small minority of people (the same ones every time, sadly) who are causing the problem. If anyone wants to continue this thread by discussing fuel prices, please do, but keep it polite and keep it relevant.
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  Yaris fuel consumption 1.0 litre petrol - what should I get to the tank? 19 Oct 2012 (Ask HJ)
  I currently own a 1999 Toyota Yaris petrol 1.0 litre. I just wanted to know how much I should expect on a full tank.
• Albany Car Hire 8 Jul 2012 (Forum)
  A couple of weeks later my son received a final demand from Albany (this was the first one we had received) demanding payment of the fuel surcharge. I explained to the female representative we had filled up the car as requested but she said we should have returned it empty. Is Albany trying to have 2 bites of the fuel cherry or should we just pay up and hope never to do business with them again?
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  Does using air conditioning affect fuel economy? 8 Apr 2012 (Ask HJ)
  The debate has started again as to whether using the air conditioning is more fuel-efficient than having the windows down. Which is correct?
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  Cruise control and fuel economy 9 Aug 2011 (Ask HJ)
  In the past few weeks you have said that a 'human' is likely to be more efficient than cruise control as a human wil allow overrun going down hills, which...
• Peugeot 406 (1999 - 2004) - 02 2.1 Fuel filter change - Diesel 5 Oct 2010 (Forum)
  Pug 406 HDi 2.1 Hi, I'm thinking of changing the fuel filter. After hearing about bits of metal getting into the fuel system, I was thinking maybe to change the whole filter housing including filter which I can get from my local Pug dealer. I'm trying to avoid problems with what is a very reliable car.
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  I changed my Ford Focus's fuel injector pump but does it need calibrating? 13 Sep 2010 (Ask HJ)
  The fuel injector pump went on my X-reg Ford Focus TDI 1.8-litre with the Endura engine. I've replaced it with a secondhand one but still no joy! Does...
• Volkswagen Passat (2001 - 2005) - 06 1.9 Hydro hybrid fuel improvement for better mp 18 Dec 2009 (Forum)
  Forget the Green bit in a way, I'm also after the Mean part of this product, i.e saving money on ever rising petrol & diesel costs at the pump. I'm very persuaded to get a Hydo unit from hydrotechnix (http://www.water-fuel-hybrid.moonfruit.com) but I'm still a little nervous. Does anyone have any experience of how well these work and if they last? For an investment of several hundred pounds (including the EECU to combat my ECU) I think I'm looking at a 2 year payback if I get 20% imporvement in fuel efficiency (25,000 miles and £1.05/l) Has anyone had any insurance issues?
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  Law and hoarder 15 Aug 2009 (Ask HJ)
  I have noticed recently, that the price of petrol has been creeping up faster than diesel. In fact I have seen it in some garages, higher than diesel....
• Peugeot 306 (1993 - 2001) - 96 1.9 Fuel Pump Solenoid? or Is It The Pump? 3 Aug 2009 (Forum)
  The nice man from the RAC (Mick) was really good and thinks its either the solenoid or the rota arm in the fuel pump. The fuel is getting to the pump but does not come out top the injectors. 1. Can the solenoid be replaced easy? 2. Can the pump be replaced easy? 3. Can it be something else? 4. Can the solenoid be by passed to see if it is faulty?