BlueShift:
The way Z energy apply their petrol discounts after the transaction. So if I want $40 of fuel, and I wave my flybuy card at the machine for a 6c/l discount, it then puts $40 of fuel in at full price and after that, subtracts 6c/l from it so I end up paying $38.23 or some stupid amount. This is mildly irritating, as I wanted $40 worth, not $38.23. When it gets really annoying is if you're using a voucher - the voucher card then gets left with $1.78 on it which is of no use to anyone except Z.
I'm tempted to take a half dozen old voucher cards in and buy a can of coke with the change on them.
My annoyance with fuel places is that they sell by $ and not my litre. So I cant ask for 50 litres of fuel when dealing with the crap discounts that only apply to 50l, I have to manually sit there ticking it up slowly at the end to hit 50.
I can understand buying fuel by the $ in the era of cash being shoved out the window to someone that pumped it for you, but the world has moved on from that, just let me put 5l into my 5l cans without playing fuel pump blackjack.