Static electricity Petrol Station fires

[Batfink]

The conclusion they came up with is that you have to have a combination of the exact mixture of vapour and air and right intensity of spark. But yes I remember that in there booth they found it impossible to cause it with a mobile phone.
However they did cause it with a manufacturer spark lol

You would have more chance of friction from the plastic phone static release than the phone operations. As an ex servo worker, when servos were full service, we all learn to glide hands along the roof of the car before touching anywhere near nozzle.