Why does the discount change from 6c to 4c? 24 May 2022 03:55 Updated The 6c per litre discount is an introductory one time offer only. The ongoing daily discount is 4c per litre. Related articles Can I use this offer on any petrol types? Can I stack this discount with other offers? Is this fuel offer legitimate? Can I share my barcode with friends and family? Why isn’t the fuel discount barcode loading?