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  EC MPG figures 21 Feb 2012 (Ask HJ)
  Hi Honest John, I'm one of the growing number of disollusioned people who bought a car in good faith, based upon MPG stats in manufacturers literature....
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  Perish, the thought 5 Oct 2011 (Ask HJ)
  I was recently on a Classic Car Tour in Italy in my 2005 Morgan Roadster. While there, the rubber hose from the fuel filler cap to the fuel tank split...
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  Will it be more economical for me to run a petrol CR-V than my current diesel CR-V? 15 Sep 2011 (Ask HJ)
  I am considering changing my 2009 diesel Honda CR-V for a new petrol CR-V. Is there an annual mileage limit whereby it makes it more economical to run...
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  Peugeot 406 starting problems 26 Jul 2011 (Ask HJ)
  I have a Peugeot 406 diesel 1999. It cut out on the motorway, after having about a week of starting problems. Diesel is getting to the injectors, and...
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  Time to switch? 15 Jan 2011 (Ask HJ)
  Not usually indecisive but can't decide whether its time to trade in my relaiable Volvo V50 2.4i for something diesel. There's quite a few good deals out...
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  Why does the fuel economy differ by 9mpg between two identical Ford Focus? 10 Aug 2010 (Ask HJ)
  My wife and I have identical Ford Focus 1.8 Zetec diesels, one four and one two years old, and we often swap. The tyres are the same make and same pressure,...
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  Is there anything I can do to improve my 1986 Peugeot 205 GTI's rough running? 10 Aug 2010 (Ask HJ)
  I have a soon-to-be-classic Peugeot 205 GTI, a 1986 C-reg that I've owned for 18 years. It's done 120,000 miles and is in generally good shape, but has...
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  Will using a premium diesel help with my Mercedes-Benz E220's running problem? 23 Jul 2010 (Ask HJ)
  My 2007 Mercedes-Benz E220 CDI with 49,000 miles sometimes used to feel like it was trying to lurch forward while moving at low speed, without any change...
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  Bad start to the year 27 Mar 2010 (Ask HJ)
  I am wondering if there is some kind of ombudsman/arbitration service available for a dispute with a garage. Long story short, I took my van into a Birmingham...
• Renault Clio II (1998 - 2001) - '99 1.6RXE Rough idle + Car won't rev up 14 Sep 2009 (Forum)
  Their report is as follows: Trouble Codes:- Oxygen sensor circuit Loss of Power to ECU Items Checked:- All engine sensors check out OK on ove data, except oxygen sensor which remains low all the time, unless fuel is restricted or MAP sensor vaccum pipe disconnected, then fluctuates normally. Continuity between oxygen sensor and ECU checked OK All earths in engine bay and on engine OK Earths and power to ECU OK ECU independently checked twice (both OK) New parts fitted:- Oxygen Sensor Inlet manifold gaskets New Fuel Pump Fuel Regulator Spark Plugs and leads Fuel replaced in case of contamination Conclusion:- Engine appears to be running far too lean I subsequntly gave the car to the local Renault garage and the cannot find anything at fault on their diagnostoc system and have checked the electricals etc and have also completely drawn a blank with their own car!
• Driving diesels with health in mind 19 May 2009 (Forum)
  My reasoning is, the compression is maintained, the exhaust temps are kept nice and high, soot build up should be reduced, possibly less smoking and carbon build up, the revs just off boost mean that big power requests are answered with enough air to fuel mix from the turbo being ready so you dont get big clouds of black smoke / unburn't fuel. So at between 1.8k and 2.6k there is possibly less stress on the DMF and turbo. I also find that providing you maintain a steady speed there is little difference in fuel consumption between lower RPM's and say 2k.
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  Ask Honest John Question of the Week: How would pay-per-mile be introduced? 30 Aug 2024 (News)
  
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  Electric cars now cheaper to run than petrol according to AA 13 Apr 2023 (News)
  
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  E10 petrol to be rolled out across the whole of the UK 22 Aug 2022 (News)
  
• Mercedes AW169. 2011 - Tyre pressure 8 Jun 2022 (Forum)
  The tyre pressures on my fuel  flap are 32 psi front   38 psi rear. Looking on internet should be 29 psi front and rear. I'm confused.  Help please.
• Cost of EVs 26 Feb 2020 (Forum)
  The battery pack cost is offset by no gearbox, cooling or ignition  systems etc etc. Modern  vehicles are the cleanest ever with cats and unleaded fuel and monitored emission checks on the mot. 
• Can you syphon petrol? 29 Aug 2010 (Forum)
  I'm thinking of getting a dual fuel stove for camping, which will run off unleaded. Can you still syphon petrol out of a car or is there some sort of trap twixt filler and tank?
• Lets have an F1 race round the M25 12 Oct 2007 (Forum)
  Wouldn't that be cool? How long is the M25? How long would it take them to get round? How many fuel stops would be required for 1 lap?
• Doh! No interior + Empty diesel tank 15 Feb 2007 (Forum)
  OK...Does anyone know how to manually open the fuel flap on a SEAT Toledo? (VW Bora clone) The button for doing it with solenoid is currently sat on the garage floor. :o)
• Passat Water Ingress 4 Dec 2006 (Forum)
  I have a very wet rear footwell in my T Reg Passat, and failed electric windows and fuel filler cap release, presumably as a consequence. The windows were not left open! Any ideas?