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Is there a way of enabling my diesel 607 to warm up faster in winter for better fuel economy? 30 Jul 2011 (Ask HJ)
I have noticed that the fuel economy of my diesel 607 improved by about 10 per cent during the hot spell of weather. Would there be any point of using... -
Buying a used Ford Mondeo - which model has the best fuel economy? 21 Oct 2013 (Ask HJ)
I am looking for a used Ford Mondeo diesel estate with the best fuel economy. I’m considering a 2010 model, with a 2.0-litre engine. What do you suggest?... -
Should I get a petrol or diesel if I do 10,000 miles per year? 30 Oct 2020 (Ask HJ)
I'm looking at a year old Skoda Superb Estate. I previously would have bought diesel but DPF issues make me nervous about that. I’d buy petrol but the... -
What is the emissions situation on larger and thirstier diesel engines? 25 Sep 2015 (Ask HJ)
With all the current hype about diesel cars, the fact that all commercial transport is oil fuelled seems to have been overlooked. What is the emissions... -
I put a small amount of petrol in my diesel car? 4 May 2013 (Ask HJ)
I recently put 0.4 litres of petrol into my Audi A3 Sportback TDI 170 Quattro. I then put over 50 litres of diesel in. After 220 miles, I filled up with... -
Why does diesel drain into the sump on cars with a clogged DPF? 9 Feb 2013 (Ask HJ)
I read that you stated that modern diesels are unsuitable for successive runs from cold, which I fully comprehend, but how does diesel drain into the sump... -
Which used diesel estate? 23 Apr 2012 (Ask HJ)
I am looking for a used (1 year old) estate. My budget is £16,000. My options are either a Mazda 6 2.2D (163PS) TS2 or a Toyota Avensis Tourer 2.0D D-4D... -
Diesel, petrol or something else? 15 Jan 2011 (Ask HJ)
My job involves lots of small stop/start journeys (40-50 per day), sometimes only driving a few hundred yards, sometimes a couple of miles and I am using... -
What is causing my C-Max's fuel filter to block? 27 Apr 2013 (Ask HJ)
My 20,000 mile Grand C-Max 1.6TDCI, after several transient episodes, recently went into permanent 'limp home' mode. The dealer reported that the fault... -
Fuel tank size 2 Oct 2010 (Ask HJ)
Is the actual fuel tank capacity usually that given in the owners manual or is it fact larger to give one a margin before running out of fuel? This a question... -
Which estate cars offer the best fuel economy? 22 Jun 2020 (Ask HJ)
What’s the most economical diesel, estate? -
Terrible fuel consumption on the Vauxhall Meriva - is this right? 8 Mar 2013 (Ask HJ)
I am thinking of buying an auto diesel Vauxhall Meriva, but the consumption in your real mpg list is very high. Is this report the result of lots of drivers... -
Will a 1997 SEAT Alhambra be more economical than our R-reg Ford Galaxy? 10 Jun 2010 (Ask HJ)
I own an R-reg Ford Galaxy GLX, 2-litre. I want something a little cheaper to run, as I do two one-and-a-half-hour school runs a day through town. Will... -
Peugeot 407 running rough 6 Mar 2012 (Ask HJ)
I have had my Peugeot 407 2.0 Diesel for 2 years now, and every 5-600 miles, the engine develops a misfire, as if it is being starved of fuel for a second... -
Why has my Audi A4's fuel tank contracted? 4 Jul 2012 (Ask HJ)
I have just had my Audi A4 serviced and the mechanic tells me that the diesel tank is curved inwards on the bottom underside as if it has been sucked in.... -
My Ford Focus won't start 18 Mar 2012 (Ask HJ)
My Focus will not start at all and displays the error code P0251. Changed the fuel pump and a diesel specialist checked injectors. Confirmed in good condition.... -
My car is suddenly using more fuel. 13 Jan 2012 (Ask HJ)
Following eye surgery I could not drive my 2007 BMW 320 diesel for a month. Since restarting my use of the car, the average fuel consumption shown on the... -
Increasing oil levels - what's the fault? 14 Nov 2014 (Ask HJ)
The oil level in my 2009 Ford Focus 1.6 diesel is increasing and I have to change the oil every two weeks to save the engine. The coolant level doesn't... -
Why is my Vectra misfiring? 20 Feb 2015 (Ask HJ)
I've got a misfire on my 2001 Vauxhall Vectra 1.7. Sometimes it's fine, others, it's struggling to go. Any ideas? -
What is causing my E-Class Mercedes-Benz to break down, and will Mercedes-Benz be liable after my warranty expires? 5 May 2012 (Ask HJ)
I have an E-Class Mercedes that I absolutely love to drive, but have had two breakdowns due to a fault in the fuel injection system. Mercedes has provided...
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