Ask Honest John

Most recently answered misfuelling questions
Sorry to bother you at Christmas (and hope you had a good one) HJ but in a moment of festive stupidity started putting unleaded in my tank. 3.5 litres before I noticed and stopped and then fully filled...
I think the motor industry has got it the wrong way round in its effort to prevent misfuelling. It is impossible to put diesel into a petrol tank but this does little harm except that the car won't start...
I purchased a four-month old Venture edition Mazda MX-5 with 1050 miles on clock. Test drive was okay a week before. After buying car (empty fuel directed to shell garage down road) Filled up with Unleaded...
We hired a Ford Focus last week but were concerned when we came to refuel the car. On opening the fuel inlet there were signs for a black fuel pump, i.e. diesel, and also a green pump, saying super unleaded....
I was in a hurry to get to the airport and accidentally put 14.8 litres of Shell Fuelsave Petrol in my 2006, 56 model diesel BMW 520d SE Auto. At the advice of an old man who happened to be at the forecourt,...
Your response to RH, Royston suggests BP Ultimate as an option. Our local BP garage has four pump units, each with three nozzles on each side. Each side has a petrol nozzle, a diesel nozzle and an Ultimate...
We are OAPs (that places us in the almost idiot class to some!) On Saturday my wife put £5.00s worth of Sainsbury's City Diesel in the petrol tank of her 2004 Daihatsu Charade - because the fuel warning...
I am another poor soul who mis-fuelled his car at Shell - due to their V-Max marketing. I used a pump which was coloured red, white and black to fill my diesel car. But the pump contained unleaded. Shell...
With reference to DS Wellesbourne wondering why it took five days for misfuelling a diesel to manifest itself, it would be because of the petrol being much lighter (typical density 07300) than the diesel...
I missed an appointment when I discovered that I needed to fill up my 2008 Ford Focus with petrol from a can, being nowhere near a filling station. I found that I couldn't, so I was effectively immobile....