Refine by channel:  Forum (2586)    Ask HJ (1587)    News (492)    FAQs (14)    Article (11)    Good Garages (1)  

Sort by: Relevance | Newest first | Oldest first

• Volkswagen Passat (1997 - 2000) - Can a 97 TDI run on bio-fuel or veg oil? 22 Aug 2008 (Forum)
  I've informed a friend about the change in fuel tax laws, where alternative fuels attract no Excise Duty so long as you use less than 2,500 litres a year - enough for about 17,600 miles. He's just bought a nice 1997 Passat 1.9TDI (90bhp) version and would like to know whether it can be run on veg oil, or veg-oil/diesel mix?
• 
  Vauxhall Corsa diesel problems 4 Jul 2016 (Ask HJ)
  I have a 2004 Vauxhall Corsa 1.3 diesel that i'm a bit worried about. The car suffers from occasional stutter on acceleration in second and third gears....
• 
  Win diesel 7 Mar 2009 (Ask HJ)
  You state that in lower temperatures diesels use more fuel. What is the thermodynamic basis for this statement? I find it difficult to figure out why...
• Any - Diesels cutting out 14 Dec 2013 (Forum)
  Yesterday HJ posted a Q/A in his Ask HJ section from Roppa http://www.honestjohn.co.uk/askhj/answer/48052/engine-cut-out-on-motorway---what-s-the-cause - Today, I have seen that the RAC is suspecting that modern "green" diesel containing bio-oils may be responsible for diesel filters blocking in cold weather. Could the two be related? While I know many do not believe in premium diesel, my car is filled only non-Bio fuel.
• TOLEDO. OCTAVIA,BORA PETROL V DIESEL 16 Jul 2001 (Forum)
  so its a OCTAVIA, TOLEDO before the BORA >>> Now the technical question for you boys in the backroom >>>>> Do i buy the petrol 1600 or the diesel 1900 tdi . Yes i know fuel consumption will be much better with the diesel but what about longevity for the engine which is the easiest to maintain considering 10 year lifespan and mileage of probably 8-9 k per year , mainly in short bursts with occasional good burst once a week.
• 
  Non starter 24 Jan 2009 (Ask HJ)
  Very recently I read a piece in your column about a car that "shut down" and simply wouldn’t start when the owner tried to move it within his drive. If...
• Diesel or Petrol? 31 Mar 2013 (Forum)
  In September I will be starting Uni, 11 miles each way on the motorway. I've been looking at Diesels for the fuel economy but now I'm not sure if I'm doing the right thing. Do I need a Diesel or Petrol? Any pointers as to which make/model to get considering an estate for boot space? Thanks to all who take the time to reply.
• What 1.6 diesel to buy? 6 Dec 2012 (Forum)
  Hi all, I've scrapped my idea of buying a Audi A3 and gonna buy a 1.6 diesel. I do 500/600 miles a week and a 2010-2012 five door hatchback diesel fits my needs. What's in important to me in reliability, fuel ecomony, looks and high spec. Budget would be around £14000-$15000 I would like to hear peoples opinions on what type of hatchbacks are out there.
• revs or torque for a smaller turbo diesel ? 19 May 2009 (Forum)
  I was wondering if smaller (below 1.9 Litres) turbo diesel engines need to be driven harder to achieve better fuel economy. I was chatting to a bloke down the pub the other night and he thinks that changing up each gear at 2.500 rpm is no good as he thinks at least 3.000 rpm to get the right revs for the next gear.
• Diesel Engine Noise 3 Jan 2007 (Forum)
  A subject I wanted to discuss for a while was why are some identical diesels more noisey at idle than others ? My A4 TDI 130 performs well, gets a good deal of hard motorway work and returns good fuel consumption, but tends to be noisier at idle hot or cold than other 'same-engined' cars such as other A4's or Passats etc.
• vauxhall astra 1.7 dth 2007 - no fuel at injectors 1 Jul 2013 (Forum)
  i have a 2007 astra diesel 1.7 dth which is getting no fuel at the injectors. i bought the vehicle half stripped due to it overheating but was running fine before this. i rebuilt with new parts but now no fuel at the injectors.
• 
  Mazda 6 vs Volvo S60 20 Jul 2016 (Ask HJ)
  We are considering buying a new car and have narrowed our choices to a diesel Mazda 6 and a S60 Volvo diesel. However we are concerned about reports that...
• 
  Is my Fiat 500 Multijet suffering from a DPF fault? 21 Dec 2013 (Ask HJ)
  I purchased my Fiat 500 diesel Multijet in April this year. It's about five years old. According to the service history, the oil was changed in October...
• 
  Could you do a long range economy test on a hybrid vs a modern diesel? 17 Nov 2012 (Ask HJ)
  I love diesels as they suit the terrain here in southern Spain; lots of steep hills where you do not need to change to a lower gear to easily get up them,...
• 
  My Jaguar XF returns 40-41mpg which is close to the official figure of 42mpg. 28 May 2011 (Ask HJ)
  Some manufacturers seem to manage to make their cars deliver closer to the official fuel figures than others. As the owner of a Jaguar XF diesel I get...
• 
  Noisy Polo fuel pump? 19 Apr 2013 (Ask HJ)
  We purchased a brand new Volkswagen Polo a few weeks ago. The car has developed a whining noise which you can hear from inside and outside. We are told...
• Mazda 6 - Fuel pump causing problems 12 Dec 2010 (Forum)
  Can anyone shed any light on my problem.. Well I have a Mazda 6, 2.0 litre turbo diesel and I accidently and very stupidly put in £5 of petrol as soon as i realised I thought it wouldn't cause much of a problem if I just filled up with diesel (which later proved to be a huge mistake).
• 
  Should I buy a diesel when I only do 5000 miles a year? 18 Jul 2023 (Ask HJ)
  I am looking for a car, preferably diesel and automatic but essential it is comfortable. My budget is under £20K what would you advise. My annual mileage...
• 
  Is there anything, other than long runs, that can clean a DPF? 2 Feb 2017 (Ask HJ)
  What year were DPFs introduced by Ford and Vauxhall. Also is there anything out there that can really clean them, apart from long drives?
• 
  Buying a new car - petrol or diesel? 15 May 2016 (Ask HJ)
  I want to buy a new car. I cannot decide between the Skoda Octavia 1.6 TDI or the Suzuki Vitara 1.6 petrol. The Suzuki has more equipment for less money,...