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BMW X1 Efficient Dynamics fuel consumption 12 May 2012 (Ask HJ)
I have a BMW X1 2.0 diesel manual efficient dynamics model I have recently bought from a dealer. The official combined fuel consumption figure is 62.8... -
Most fuel efficient used car under £20,000? 24 Oct 2022 (Ask HJ)
What are the best used cars for fuel economy for less than £20,000? -
Best diesel for Jaguar F-Pace? 5 Oct 2016 (Ask HJ)
I have a new Jaguar F-Pace. Is it worth buying branded diesel,rather than supermarket fuel? If so is premium worth the extra? -
Should I use supermarket petrol? 9 Apr 2014 (Ask HJ)
Should I use cheap supermarket petrol or better quality branded fuel? -
Toyota RAV4 diesel pump - has it died? 13 Dec 2012 (Ask HJ)
I have a 2005 Toyota RAV4 diesel with 57,000 miles on the clock. It was running fine, but now won't start. We've been told that it's probably the diesel... -
What steps do I need to take in recommissioning a car that's been standing for 18 years? 16 May 2019 (Ask HJ)
A friend has asked by advice on returning their 1992 Sierra Sapphire Cosworth 4WD back to roadworthy condition. It is in immaculate original condition... -
Why are the fuel injectors corroding on my Peugeot horsebox? 4 Jul 2017 (Ask HJ)
I have a problem with my Peugeot Boxer horse box. It is four years old and has only done 6500 miles. To date, I have had to replace two fuel injectors... -
Is a cold-start knocking in my Superb Estate the result of contaminated diesel or a failing DMF? 3 Aug 2013 (Ask HJ)
Having given my local Skoda garage £370 to flush contaminated diesel from my Superb estate, a serious cold-start knocking issue persists as bad as ever,... -
Starting problems with a van when warm - any ideas? 23 Mar 2013 (Ask HJ)
I'm having trouble starting my van when the engine is warm. I've just had a new timing chain put on by my mechanic and since then I have this problem.... -
Which premium diesel fuels are the best for which types of driving? 2 Feb 2013 (Ask HJ)
I have been reading with interest your advice on diesels having just taken delivery of my new company car a Mercedes-Benz E350 CDI. Like all diesels, it... -
Ford Focus management light 2 Jan 2013 (Ask HJ)
I own a 2003(53) Ford Focus TDCi, and over the past months - now and then even mid journey - it goes a bit sluggish, as if turbo not kicked in! Then lots... -
Why has Shell's 'fuel saver' diesel increased my Chevrolet Cruze's consumption from 29.4mpg to 27.86mpg? 3 Apr 2011 (Ask HJ)
I have now run a Chevrolet Cruze diesel auto for over one year. Since Shell introduced "Fuel saver" diesel, my consumption has increased to 27.86 mpg average... -
You're wrong about the effect of coasting on fuel economy. 29 Aug 2010 (Ask HJ)
Twice in the past year you have answered a similar question to 'is it economical to coast in neutral down hill'. Both times your answer is wrong! Of course... -
Stupid fuel 15 Aug 2009 (Ask HJ)
I recently did what appears to be what an ever increasing number of diesel fuelled cars owners are doing in that I filled my diesel Focus with petrol.... -
Was I missold a car because it's not getting the mpg I was told? 22 May 2020 (Ask HJ)
What do the WLTP phases mean in real terms? Is the extra high phase just motorway driving? Basically, I bought a new Hyundai Kona 1.6 hybrid as I wanted... -
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... -
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... -
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? -
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... -
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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