Under the Safeway scheme, customers who spend £25 in the store will receive a 2p per litre discount (10p per gallon). This rises to 5p a litre for those spending £50, 8p per litre for spending £75, 12p per litre when spending £100 and the full 20p per litre when spending £150. Safeway said that on average, its customers spend £80 per week, entitling them to an 8p per litre discount.