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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. -
Mondeo or Insignia? 10 Mar 2013 (Ask HJ)
I'm in the market for a second hand car, an 09 or 10 model. Which should I go for - a 1.8YDCI Mondeo or a 2.0 CDTI Insignia Exclusive? I do around 550... -
Car smells of petrol? 17 Aug 2012 (Ask HJ)
I can smell petrol inside my car when driving. Not overfilled the car and not spilt fuel. Can smell it when I get in the car in the morning and very strong... -
Engine failure after 15,000 miles 29 Jun 2012 (Ask HJ)
My friend's engine failed completely after only 15,000 miles, dealership says the cause was too much oil in the engine, but he has never added any between... -
Changing to larger wheels 17 Jan 2012 (Ask HJ)
My car has factory fitted 15" alloy wheels. I was thinking of fitting 17" lower profile tyres - but the overall circumference of the wheel would be the... -
K&N air filter 16 Oct 2011 (Ask HJ)
I'm thinking of fitting a K&N air filter to my Toyota Auris 1.6 petrol manual 2008. Would it improve performance, affect fuel economy, or affect my insurance? -
Petrol or diesel Focus? 9 Jul 2011 (Ask HJ)
I change my current Focus [motability] in December. What are the options between the 1.6 petrol & 1.6 diesel, i do approx 8000 miles per year. Would there... -
Peugeot 306 diesel erratic start 11 Jan 2011 (Ask HJ)
When I start my Peugoet 306 D Y-reg up it is erratic (shakey), but after about a minute it goes away. Do you no what is causing this and what I need to... -
Is Volkswagen liable for a fuel injection fault on my Passat? 3 Sep 2010 (Ask HJ)
www.honestjohn.co.uk/forum/post/index.htm?t=85270 I looked at the above thread and I have suffered the same problem with my car. Is Volkswagen liable... -
Non-starter 10 Jul 2010 (Ask HJ)
My 2007 Mazda2 diesel normally runs very well. Recently, on odd occasions it turns over OK but will not start. The AA man squirts quick start and away... -
Less inclined 12 Mar 2010 (Ask HJ)
Please advise if the use of cruise control on my 1.9SE TDI VW Passat Estate gives a better fuel consumption over and above normal accelerator use on long... -
Is a diesel still better than petrol for high mileages? 1 Nov 2022 (Ask HJ)
I have been a diesel car driver covering around 30,000 per year for the last 10 years and would like to add my two pence to the conversation. Along the... -
Audi A6 Avant blowing white smoke 29 Jul 2016 (Ask HJ)
I recently bought a 2007 Audi A6 Avant 2.0 TDI. It had previously been sitting idle for a month or two, but drove fine on the trip home. However, after... -
Rough idling Audi A4 8 Jul 2012 (Ask HJ)
I have an ageing (53 plate, 120,000 mile) Audi A4 1.9 TDI. It has been a great car but over the past few months the idle has gone "lumpy" intermittently.... -
Extra 'recommendations' during car service — are they really necessary? 19 Jun 2012 (Ask HJ)
Yesterday I had my Hyundai's 3rd year service and 1st MOT carried out at Halfords. They came back to me with 'recommendations' including: 1. An engine... -
Why don't you set up a database of real fuel economy figures supplied by your readers? 21 Mar 2011 (Ask HJ)
I was interested to read Andrew English bemoaning the fuel consumption of the Ford S-Max 2.0 diesel automatic compared to the quoted figures. He struggled... -
Is there a major fault with the DPF-equipped Mazda 6 diesel engine? 27 Jul 2010 (Ask HJ)
The Mazda 6 diesel engine, from its first incarnation to the current model, has a new form of diesel engine with a diesel particulate filter. According... -
Can of warns 10 Jul 2010 (Ask HJ)
Recently I visited my local Sainsburys petrol station in Grantham to fill up my jerrycan with petrol. As I was about to do this, the manager came over... -
Why does my car not start sometimes? 13 Sep 2025 (Ask HJ)
Why will my Renault Clio not start sometimes? It turns over but won’t start yet if I leave it for a while then it starts. Any suggestions? -
Breakeven point for petrol versus diesel? 28 Dec 2022 (Ask HJ)
I am looking at the SEAT Ateca - either the 1.5 TSI DSG Or 1.6 TDI DSG. I have been doing up to 15,000 miles a year of mixed motoring. What would be the...
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