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I put petrol in my diesel car? 3 Jun 2013 (Ask HJ)
I've put eight litres of petrol in my 2.0 diesel Peugeot 307. The car is 51 plate. The tank was in the red, I wasn't paying attention. When I noticed I... -
How much is an MHEV battery? 12 Feb 2024 (Ask HJ)
I'm thinking of buying a fairly new used car. Most of them seem to have mild hybrid engines, but I haven't found information on how long these batteries... -
Why is my Hyundai i20's fuel economy so bad? 4 Dec 2016 (Ask HJ)
My previous Hyundai i20 - four-cylinder 1.2 petrol - was capable of 50mpg with careful driving. I've since replaced it with a newer model - three-cylinder... -
Buying a used Audi A4 diesel - should I get the EGR valves cleaned? 10 Nov 2016 (Ask HJ)
I'm buying a 2013 Audi A4 diesel with 110,000 miles on clock. I always use Shell V Power diesel and do 30,000 miles driving a year. I intend to keep the... -
Will premium diesel make my DPF last longer? 27 Sep 2016 (Ask HJ)
You frequently advocate the use of Shell V-Power Nitro Diesel which I have used in my Citroen C5 from new. You also state that diesel engines are prone... -
How can I improve my Octavia's fuel economy? 27 Apr 2015 (Ask HJ)
I have a 2013 Skoda Octavia 2.0 diesel. However, while my old Octavia gave 65mpg, I find the new model to struggle to get past 50mpg. I understand... -
Should I keep or sell my Mk2 Golf? 18 Aug 2014 (Ask HJ)
I bought my 1990 Volkswagen Golf from new in September 1990. It has alloy wheels, sunroof, radio cassette, CD player and 113,000 miles on the clock. It... -
What's causing the engine light illuminate on my Mercedes E-Class? 11 Oct 2013 (Ask HJ)
I bought a 2009 Mercedes-Benz E-Class CDI Blue Efficiency two days ago and the engine management light has come on. I took it back to the dealer and they... -
Is this fuel economy normal 7 Sep 2012 (Ask HJ)
I bought a 2006 Mondeo TDCI. It's running perfectly and has just had a major service. I'm only achieving just over 120 miles per 1/4 tank and thats on... -
I successfully sued Tesco for not labelling fuel pumps properly. 28 Jul 2012 (Ask HJ)
I poured unleaded petrol into my diesel Hyundai iLoad van a few months ago at Tesco, but luckily realised before starting the engine. I looked at the pump... -
Is my tank bigger than the manual says? 1 Mar 2012 (Ask HJ)
I filled up at a Shell station with V-Power following you advice. The range indicator was 60 miles before fill-up indicating 7-8 litres of fuel remaining,and... -
1999 HDi black smoke on revving 4 Nov 2011 (Ask HJ)
I have a Peugeot 406 HDi 1999 (90bhp). . It has failed its exhaust emmissions test 4.7 showing and it needs to be below 3.0. There was a lot of black smoke... -
DERV hurt 9 Oct 2011 (Ask HJ)
I have recently purchased my first diesel car and have been informed that I should put the expensive diesel in from time to time as it is a cleaner fuel... -
Deal. Or no deal? 29 Aug 2011 (Ask HJ)
A Range Rover, dealer is advertising new Diesel Range Rover 4.4 TD V.8, cash price: £68,995, deposit: £41,436, pay after 24 months £27,549, or give the... -
Auris fuel economy 23 Aug 2011 (Ask HJ)
You stated that you were able to return 62.3mpg on a 300 mile trip in father in laws Toyota Auris hybrid. We have had ours since September and can only... -
How can you tell which cars have DPFs? 16 Mar 2011 (Ask HJ)
Is there any easy way of telling which diesel cars have a DPF? I had assumed it was only those that were Euro V compliant but when browsing some second... -
Convertible to cash 26 Jun 2010 (Ask HJ)
Redundancy and a change of lifestyle are forcing me to part with my BMW 330Ci Sport coupe. I purchased the car, new and to my own loaded spec, in March... -
Double charged 31 Oct 2009 (Ask HJ)
I have a VW 1.4 Twincharger, 2 years old, which has developed a frequent slight hesitation at about 3,500 rpm when accelerating; this may be as it switches... -
Doesn’t figure 24 Oct 2009 (Ask HJ)
Just over a month ago I bought a March 2009 Mazda3 1.6 Sport. Under the technical details of the car the Combined fuel consumption is 40.9mpg (Urban 31.7... -
Jazz blues 7 Mar 2009 (Ask HJ)
In terms of fault occurrence, my Jazz is the most unreliable car I have ever owned. After a few hundred miles, the fuel consumption worsens by 10mpg or...
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