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Is it worth using premium grade petrol? 26 Feb 2018 (Ask HJ)
Is premium grade petrol good value? -
Can you recommend a car with good fuel economy on a budget of £6000? 9 Mar 2017 (Ask HJ)
I do approximately 20,000 miles per year, of which the majority is motorway driving. Can you recommend a car with good fuel economy on a budget of £6000? -
Auto 'box 'HOLD' switch - does it save fuel? 6 Jan 2014 (Ask HJ)
Does using the 'HOLD' switch on the Subaru Forester's auto gearbox reduce fuel consumption? And is there any downside to using it other than reduced acceleration? -
Which fuel should I use in my Audi S5? 5 Oct 2013 (Ask HJ)
I've just bought an Audi S5 Sportback; the preferred petrol is 95 RON as marked on the filler cover. Can I use Shell Vpower or is this too rich? -
Fuel injector change - easy? 9 Jan 2013 (Ask HJ)
I am just inquiring whether changing the fuel injectors on the scenic is a straight forward job, i ave changed the plugs and coils at present but need... -
Do diesel engines use more fuel in Winter? 24 Feb 2012 (Ask HJ)
Can you tell me if diesel engines use more fuel in winter? -
Missing additive tank 24 Apr 2011 (Ask HJ)
My Peugeot 406 coupe is missing its fuel additive tank. What will it do to the car and its performance? -
Fuel additives 18 Apr 2011 (Ask HJ)
My daughter has used Lucas upper cylinder lubricant as a fuel additive with her Honda Civic 2.2 cdi and experienced much better mpg figures. Would this... -
How reliable is the Lexus GS300 and what's fuel consumption like? 26 Aug 2010 (Ask HJ)
I would like to enquire about the reliability of the Lexus GS300 2001 model. What is the average fuel consumption? Is there anything in particular I should... -
My Ford Mondeo won't start - where's the fuel pump? 7 Sep 2010 (Ask HJ)
My Ford Mondeo has been laid up for six years but has regularly been started. Today I am trying to start it and there is a spark at the plugs but they... -
Why aren't fuel pumps designed so that nozzles can't be replaced wrongly? 22 Aug 2010 (Ask HJ)
Can anyone confirm that all petrol nozzles at a fuel station will also fit in the diesel holder of the pump? Around eight months ago I filled up at... -
What's the fuel economy of a diesel Hyundai iLoad with a light load? 9 Mar 2017 (Ask HJ)
What's the fuel economy of a diesel Hyundai iLoad with a light load? -
Rattling fuel tank baffles 24 Dec 2012 (Ask HJ)
My 2003 SL350 has rattling baffles in the fuel tank. Mercedes will not repair FOC even though they lost a court case on this elsewhere in 2012. Can you... -
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... -
Peugeot 406 showing faults P1138, P0101 and P0191. 29 Sep 2012 (Ask HJ)
I own a Peugeot 406. The engine cut out whilst driving; fault was diesel pressure sensor. Replaced sensor. Engine diagnostic light on again and the car... -
Is coasting downhill better than descending a hill in gear? 30 Jun 2012 (Ask HJ)
With my DVLA road tax reminder I received a leaflet exhorting me to save money (and petrol) by adopting a “smarter driving style”. Included was the advice... -
This Italian car website shows the fuel consumption of various cars at top speed. 8 Apr 2012 (Ask HJ)
I thought you might find this interesting from an Italian car magazine - fuel consumption at top speed. If you wish to look at other models, go to www.alvolante.it,... -
Engine problem with my BMW 5 Series 2 Apr 2012 (Ask HJ)
My BMW has a problem. When accelerating it immediately starts to shudder. I stop and the engine is very rough as if it is misfiring. -
Why aren't modern cars fitted with freewheeling devices like that found on the Rover P4? 27 Aug 2011 (Ask HJ)
Rover fitted a selectable free wheel device to its ‘Aunty’ models in the 1960s. I recollect my father using it for most of his driving. Why has something... -
Diesel additives 6 May 2011 (Ask HJ)
Today's diesel fuel is low sulphur - an EU requirement for polution control - but sulphur helps lubricate the fuel system. I have been told that by adding...
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