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What do you think about the new generation of diesel engines which use reduced compression ratio to improve fuel consumption? 23 Nov 2013 (Ask HJ)
There is an article in a recent ‘Economist’ magazine on a new generation of diesel engines. These apparently achieve better fuel consumption by reducing... -
Can a petrol pump temporarily malfunction and provide the wrong fuel? 12 Jan 2012 (Ask HJ)
Some 18 months ago I filled my car at my usual Tesco petrol filling station using the diesel pump and getting a receipt for diesel. After about 800 yards... -
Diesel freezing in the Alps - how can I avoid it 21 Nov 2012 (Ask HJ)
My car, a Mazda 6 TS2 Diesel 2.2, is kept in the Alps during the winter at a height of 1300 meters. In February for two weeks, the temperatures ranged... -
What Super fuel do you recommend? 6 Nov 2017 (Ask HJ)
I've followed your advice for a number of years regarding premium fuel, both petrol and diesel. I usually put BP Ultimate or Shell V Power in both cars,... -
Will a diesel Volkswagen Golf be more economical than the petrol version? 16 Mar 2013 (Ask HJ)
New Golf 1.4TSI petrol or new 1.6TDI diesel? I’ve done the maths. For both cars after three years at 8000 miles per year at urban mpg (43 petrol and 62... -
Who is responsible for my Ford Focus suffering from a blocked fuel filter? 11 May 2013 (Ask HJ)
I recently had a problem with my 2-year-old Ford Focus diesel whereby the car went into limp mode on the outside lane of a dual carriageway. The eventual... -
Why is diesel more expensive than petrol? 2 Nov 2012 (Ask HJ)
Could you explain why the cost of diesel fuel is up to 8p per litre more than petrol? As diesel is a lower fraction of the crude oil from which it is made... -
Mike and Burny winter 10 Jan 2009 (Ask HJ)
I took delivery of a new Audi A4 Avant 2.0 litre 143 manual TDI in August and having now covered more than 5,000 miles I am disappointed with the fuel... -
KIA Carens starting problem 20 Jul 2016 (Ask HJ)
My KIA Carens has been difficult to start. It usually takes at least 10 seconds when cold and around eight seconds when hot. Had a new battery and fuel... -
It's almost impossible to get fuel into our newly bought used car - what's the problem? 4 Aug 2017 (Ask HJ)
My daughter just bought a 2006 Ford Focus 1.8 TDCi from a used car trader. It's only possible to put a trickle of diesel in or else the nozzle cuts out.... -
Is it okay to use fuel additives? 21 Nov 2012 (Ask HJ)
Over the years I've used Miller's Diesel Plus in our diesel cars, mainly to lubricate the injector pump rather than seeking extra performance. We have... -
Real fuel economy of the 2011 Focus? 18 Jul 2012 (Ask HJ)
I really like the look of the 2011 Focus, it gets excellent reviews in most motoring journals. So why is the real fuel consumption from your register,... -
Where can I find the fuel pump on a Renault Laguna? 25 Nov 2014 (Ask HJ)
I think the fuel pump has packed in on my Renault Laguna. Where is it and how can I access it? -
Ford S-Max suffering injector problems - can I fix it myself? 7 Dec 2014 (Ask HJ)
My Ford S-Max has a diesel leak from what I believe is the fuel injector manifold. It sits in the middle of the engine and six silver metal pipes come... -
Filled diesel car with petrol - what damage have I done? 2 Apr 2015 (Ask HJ)
My father-in-law recently filled his 2010 Mazda 6 diesel with petrol. After driving up the road, the car stopped and wouldn't restart. He was towed into... -
Adding anti-waxing agents to diesel? 30 Apr 2013 (Ask HJ)
What anti waxing agent can I add to diesel? I have had three blocked fuel filter problems this winter. -
Which vans are best for fuel economy? 11 Sep 2010 (Ask HJ)
I'm getting a van and I want one in which two people could sleep in the back and do some rough camping on surf trips. The biggest issue for me is fuel... -
Why is the fuel economy so poor in our Toyota Verso diesel? 26 Apr 2016 (Ask HJ)
My wife drives a 2011 Toyota Verso 2.0 D4D with 60k miles on the clock. My wife drives mainly short journeys of 10 miles with a couple of longer motorway... -
HELP! I put diesel in a petrol Ford Ka 15 Apr 2013 (Ask HJ)
I put diesel in a petrol Ford Ka. How can I get the fuel out from the top off the tank? -
Fuel efficiency by time of year 3 Dec 2012 (Ask HJ)
I now have a Kia Cee'd Ecodynamics 2011 but despite economical driving (e.g. 50-55mph on motorways, smooth braking etc) it's only getting about 49MPG....
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