Another fuel price hike on the horizon - AA According to the AA's estimates petrol is expected to increase by 66 cents per litre, diesel will go up by 57 cents per litre, and there will be a 49 cents per litre rise in the price of paraffin. FILE: The the price of petrol is expected to increase by 66 cents per litre on Wednesday, 3 March 2021. Picture: EWN 47 days ago JOHANNESBURG – Motorists will have to dig deeper in their pockets from Wednesday as the price of petrol is expected to increase by 66 cents per litre. Diesel will go up by 57 cents per litre and there will be a 49 cents per litre rise in the price of paraffin.