Ask Honest John

Most recently answered premium fuels questions
I wrote recently, and thank you for the reply, about my 2011 X-trail and the "flatness" around 2000rpm. My dealer says they all do it, something which I cannot believe and after much effort have now got...
I usually put manufacturers' advertising claims down to empty rhetoric designed to do little other than shift a possibly indifferent product. As a user of Shell V-Power petrol, I am aware of their heavily...
Am I wasting money by occasionally purchasing Esso Supreme? I do this with the idea of it perhaps cleaning the engine and parts of my Mazda 5 Sport. I do only 2000 miles a year.
My six year old Ford Focus only just passed the MOT emissions test, and I have been advised to use super unleaded petrol to keep the engine clean, is this a wise move?
Is there any benefit in using Shell V-Power diesel in my new Octavia 1.6 DSG or is it intended more for high performance cars? I only do about 6000 miles a year.
I drive a 2007 Volkswagen Passat 2.0TDi 140 SE saloon. Could you please advise me if using Millers Diesel Power ECO MAX fuel additive is worth the expense? I normally fill up with Shell diesel but I do...
Following your advice in the Telegraph to use Shell V Power or BP Ultimate Diesel I can, with certainty and experience, say it is the best thing I have ever done since taking ownership of an imported 2.5...
I run my 1960 Standard Vanguard using Miller’s VSP Power Plus as a lead replacement additive. I have now acquired a 1967 Triumph 2000 which has been run using Castrol Valvemaster Plus. Can I safely replace...
I am about to purchase a new Mercedes E220 ‘Executive SE’ saloon. I have read varying reports on supermarket diesel fuel and I am reluctant to fill up at my local supermarket. As an alternative, would...
We decided to take your advice and use Shell V-Power in place of supermarket fuel. When we started the trial, a petrol station attendant enthusiastically told us he had made an overall saving of 8 per...
 

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