Paying for petrol whilst at the pump is now gaining ground in Australia, with the Woolworths Caltex service having brought out its 
system.
You can easily check which Petrol Stations in your area have the “pay at the pump” facilities, by looking on this webpage, but make sure you tick the epump option:
If you are a regular shopper at Woolworth’s, you can have your Everyday Rewards card linked to your Woolworth’s Credit card, and get the Petrol discount automatically taken off your petrol price when you swipe your card at the pump.