Ask Honest John

Most recently answered misfuelling questions
I put unleaded in my Ford S-MAX 2.0 TDCI. The diesel ran low (20 miles left approx) so went to fill up, got distracted and put in 31 litres unleaded. Did not turn engine on and have siphoned out approx...
I recently put 0.4 litres of petrol into my Audi A3 Sportback TDI 170 Quattro. I then put over 50 litres of diesel in. After 220 miles, I filled up with diesel again. There have been no obvious effects...
I got distracted this morning and put just over two litres of V-Power petrol into my Hyundai i30 diesel before I realised. There was already about a quarter of a tank of diesel in the car. I stopped and...
I put diesel in a petrol Ford Ka. How can I get the fuel out from the top off the tank?
I collected my new VW Scirocco (2.0 TDI GT DSG - 170bhp- 2010 plate) from a dealer on Friday. We had a 100 mile journey back home and the car seemed to perform very well. After parking the car outside...
I have a problem with my 2011 Ford Focus 1.6TDCI (old model). When first purchased it gave me 54mpg. 14 months later it has now reduced to 47mpg with the same sort of driving pattern. I have tried to add...
When I bought the Evoque the salesman made much of a failsafe device in the fuel filler neck which would prevent misfuelling. Filled diesel car with petrol and drove about a mile. Dealer denies any liability...
On your recommendation, we've just bought a Yaris diesel. Many people seem to have filled their car with petrol by mistake. Although we've had diesels in the past and can't imagine doing it, many people...
On Saturday evening, with the distance to empty stating 40 miles on his 2002 Audi A4 1.9 TDI estate, my father misfuelled, putting approximately 25 litres of unleaded into the tank before realising. He...
I know it is my fault, but I filled my diesel Mercedes-Benz car with petrol, and landed myself with a bill for £730. Amazingly, the car travelled 75 miles before the engine cut out. The service manager...