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Is it credible that the new Mercedes-Benz CKS 350 petrol returns 40mpg? 5 Mar 2011 (Ask HJ)
I was surprised by the fuel consumption claim of 40mpg combined for the new Mercedes-Benz CLS 350 petrol model. I think the old model 320CDI was 36mpg... -
Should I used a diesel additive? 15 Jul 2024 (Ask HJ)
Should I use additives in a 3.0 Jaguar F-Pace diesel, other than AdBlue? -
Should I used premium petrol in my BMW Z4? 8 Aug 2022 (Ask HJ)
I drive a BMW Z4 M40i, will I benefit from using premium grade petrol such as Shell V Power? -
Is there a drag coefficient directory? 29 Jun 2022 (Ask HJ)
I do a lot of motorway miles and am keen to find an aerodynamic car - most makers publish drag coefficients (Cd) but I'm struggling to find CdAs Cd x frontal... -
Can you recommend an efficient seven seater? 24 Jul 2020 (Ask HJ)
Can you recommend a reasonably efficient, petrol, seven seater? I have about £12,000 - £13,000 to spend. Thanks. -
Is there any way to improve fuel economy? 13 May 2020 (Ask HJ)
My Kia Venga petrol auto 1.6 drinks petrol. Is there anything I can do to get better MPG. It's a 2016 model with only 30,000 miles on it. -
Why won't my Transit rev above 3000rpm? 10 Mar 2020 (Ask HJ)
I have a 2016 Ford Transit. The fuel filter light came on and a message said it’s blocked. It won't rev above 3000rpm. I changed the fuel filter this morning... -
Would changing the tyre spec of a car change the mpg? 3 Jul 2017 (Ask HJ)
Would changing the tyre spec of a car change the mpg? If so, by how much? The Ines we are looking at come with an 18-inch alloy and we are looking at the... -
Will using the air con on high waste fuel faster? 26 May 2017 (Ask HJ)
I have a 2017 Toyota Yaris. Will using the air con on high waste fuel faster? -
Which 4-6 year old estate should I get for reliability and driving pleasure? 2 Jan 2017 (Ask HJ)
A while back you recommended a Honda Civic for my daily commute. I'm mightily happy with it but now I need a petrol Estate. Up to say 6 years old, capable... -
Skoda Octavia won't start when engine is warm 8 Sep 2016 (Ask HJ)
I have a 2008 Skoda Octavia diesel with a DSG gearbox and 40k on the clock. The car starts first thing, when the engine is cold, but doesn't start very... -
Engine issues when petrol low 11 Jun 2015 (Ask HJ)
I have a BMW 116 2006 model where everything seems to be fine until petrol is low the symptoms start to show. First the engine management light will come... -
Which fuel for the new Golf? 31 Oct 2014 (Ask HJ)
What octane petrol should a new Golf with the 1.4 turbo engine use? My previous mkV 1.6 FSI had to run on 98 after burning out a nox sensor on 95/97. Is... -
Car cuts out when towing a caravan 10 Sep 2014 (Ask HJ)
When towing my caravan, the engine in my 2005 Hyundai Sant Fe cuts out tackling steep hills or pausing at a roundabout. The car will restart after 30 seconds... -
Can you recommend a small car with good fuel economy? 24 Apr 2014 (Ask HJ)
I am looking for a used small car that will be very cheap to run, with high mpg and a reliable (diesel preferable) engine. I do about 13,000 miles per... -
Would I get any benefit from switiching to Shell V-Power or similar? 27 Jan 2014 (Ask HJ)
I usually fill up with branded diesel rather than supermarket diesel but would I get any benefit from switiching to Shell V-Power or similar? My car has... -
Can you recommend a diesel automatic for £10,000? 14 Sep 2013 (Ask HJ)
With a budget of £10,000, what Focus or bigger-sized diesel auto would you recommend secondhand? I'm running 30,000 miles per year, so it shouldn't be... -
Diesel pump failure killed my Note 27 Mar 2013 (Ask HJ)
My 6 yr old fully serviced Nissan Note 1.5DCI, with 70K miles refused to start. It has gone to the garage and the diesel pump has failed, pushing metal... -
Hot Starting Problem on a Volkswagen Golf 29 Jul 2012 (Ask HJ)
No problems for the 1st 105,000 kms. For 5,000km have had a hot starting problem; replaced fuel filter and ECT sensor; diagnostics indicate no problem.... -
Why shouldn't I use supermarket fuel? 1 Jul 2012 (Ask HJ)
I get the impression that you think it best to avoid supermarket petrol. Why?
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