VAAL TRIANGLE - Motorists will pay less for fuel from tomorrow. The Department of Energy announced this morning that petrol will cost 13 cents a litre cheaper from midnight, while diesel will be between 14 and 16 cents a litre cheaper. The price of paraffin will be 23 cents a litre lower. The AA predicted last week that the price of fuel would fall due to a decrease in the oil price and the rand that strengthened last month. However, the rand weakened again, limiting the fall in fuel prices.