Can Petrol be faulty?

[Reg]

If one is bigger than the other then its obviously going to be possible to **** it up one way around isn't it?

Hairy, I personally would suspect something other than fuel. To make that dramatic a difference would need to be something more mechanical/electrical. There is a lot of hype about 95 + 98 RON fuels, and that they cause this amazing transformation. They don't - or at least, not in a few miles. Unless you pull the battery lead and reset the ECU it will take a good while (usually a tank or so) for the ECU to adapt fully. If it was 95 instead of 98 it would have made absolutely minimal difference at most, noticeable if you were really pressing on.

 

[Dennis]

The super unleaded fuels can go off due to age so I always tell our lass to use busy shell forcourts.

Re water in your tank you can get some wynns stuff that gets rid of this (you can get it in an extreme box with oil addetive and injection cleaner for £20)

 

[matt_s]

I think Diesel Nozzles and filler necks are bigger than petrol ones, so where it would be hard to fit a (big) diesel Nozzle into a (small) petrol filler neck, the (small) petrol nozzle would easily fit into the (bigger) diesel filler neck.
Hope that made sense?
Only way i can see to prevent it from happening (apart from cutting one finger off anyone who got it wrong (that would make you think twice next time) ) would be to use the "round peg, square hole" method where it is impossible to match the two.

That's it exactly, seeing as Hairy has an LCR it's got to be petrol. I saw a woman try to put diesel in a v6 mondeo, wasn't till she move the car and tried again that it clicked what she was doing. The look on her face was a picture when i pointed it out.

 

[Hairy]

Well I've just added some 'Wynns Dry Fuel' and topped up with BP Ultimate, only time will tell now, fingers crossed.