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  Vdub: to Lead or not to Lead? 25 Sep 2013 (Ask HJ)
  Hi John, I've been to many classic car shows and stands across the UK and one topic with huge confussion I face is the story of adding lead to classic...
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  Renault Scenic plug leads 12 Apr 2012 (Ask HJ)
  My son in law took off his plug leads and didn't notice how to put them back. Would it be possible for you to tell me which plugs go where?
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  Can you charge a battery off-car using jump leads? 17 Jan 2012 (Ask HJ)
  Can you charge a battery by connecting it to another car by jump leads?
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  Can I run my classic Mercedes-Benz W123 E-Class on unleaded fuel with an additive? 11 Jun 2010 (Ask HJ)
  I am buying a 1982 Mercedes-Benz W123 200E. It is in superb condition, having only covered 99,000 miles. Would it be better to run it with unleaded fuel...
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  Can I replace the lead acid battery in my car with a lithium battery? 10 Jul 2024 (Ask HJ)
  My diesel engine is a 1990 unit, can I just replace the lead acid battery for a lithium battery
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  What is the best lead additive on the market for four-star petrol? 20 Jan 2020 (Ask HJ)
  I have a 1958 Bentley S1. What is the best lead additive on the market for four-star petrol?
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  Does the use of jump leads damage modern car electronics? 29 Jan 2012 (Ask HJ)
  A relative recently had to call a rescue service to start her car. She was told that jump starting, either the car to be started or the car used to start...
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  In which order do I refit the HT leads on my Volkswagen LT35? 30 Jul 2010 (Ask HJ)
  I've bought a Volkswagen LT35 and someone has pulled the HT leads off the dizzy cap and the plugs. I don't know how to put them back and in what order...
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  Can all makes of electric car be charged from the same charger? 5 Nov 2018 (Ask HJ)
  I am thinking of buying an electric car and having a home charging point fitted. Can all makes of car be charged from the same charger? Or will I need...
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  Should I buy a lead acid or calcium battery? 25 Sep 2018 (Ask HJ)
  I have a 1999 Morgan +4. Should I buy a lead acid or a calcium battery? My last battery was a Halfords lead acid and lasted seven years.
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  What lead additive can you suggest for our 1977 MG Midget? 12 Feb 2018 (Ask HJ)
  We have a 1977 MG Midget owned from new with 45,000 miles on the clock. The engine is original and we've been using Castrol Valvemaster Plus additive....
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  Can you recommend a good, small jump start pack? 22 Nov 2017 (Ask HJ)
  I have read quite a few forum posts about jump starting modern cars (or not) using jump leads, and the (various) procedures to do it (or not), and am somewhat...
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  Should I run my 1971 MG MGB on premium petrol? 9 Feb 2018 (Ask HJ)
  I have a 1971 MG MGB roadster, bought recently as a retirement present. I’ve wanted one for 50 years and I’m delighted, but I don’t know whether I should...
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  Will a brief lack of lead substitute damage the engine of my Series III Land Rover? 6 Feb 2012 (Ask HJ)
  I normally add some lead substitute to the tank of our 1980's Series III Land Rover. The other day I didn't (because the garage didn't have any on its...
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  Does leaded petrol contain ethanol? 17 Jun 2019 (Ask HJ)
  Does leaded petrol contain ethanol?
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  Overfuelling Polo GTI 8 Feb 2012 (Ask HJ)
  Is there a known problem with high oil consumption in the current Twincharged Polo GTI 1.4?
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  Ford Fiesta won't start. 11 Nov 2014 (Ask HJ)
  I have a 2001 Ford Fiesta which sometimes doesn't start. The battery is fine, but when I leave it for a few days it will refuse to get going. Any idea...
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  My Vauxhall Vectra isn't running because I can't get the firing order right. Any ideas? 7 Sep 2010 (Ask HJ)
  I recently replaced a head gasket on a Vauxhall Vectra B 1999 T-reg SRI estate petrol. The car was running nicely before being taken to bits to replace...
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  Why are waiting times for new car orders so long? 12 Jul 2018 (Ask HJ)
  I would like to purchase a new car and have been looking at the current generations of Audi Q5 and Volvo XC60. I have been quoted lead times of seven and...
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  Why does my 2014 MINI Countryman Cooper S smell of petrol? 30 Jan 2017 (Ask HJ)
  My wife has owned a 2014 petrol Countryman Cooper S from new. Over the last few months the smell of petrol in the passenger compartment and outside when...