The retail price of petrol will increase by 84 c/litre on July 3 2013, the department of energy has announced.In Gauteng the price of 95 octane petrol will increase to R13.23 a litre and R12.86 a litre at the coast. The price of both grades of diesel is set to increase by 78.20 cents a litre at the same time.WEAK RAND TO BLAMEThe department said: “The average international product prices of petrol, diesel and illuminating paraffin increased during the period under review. The average rand/US dollar exchange rate weakened when compared to the previous period. The average rand/US dollar exchange rate for the period May 31, 2013 and June 27, 2013 was R10 compared with R9.29 during the previous period.” “The weakening of the rand against the US dollar increased the contribution to the basic fuels price on petrol, diesel and illuminating paraffin by 58.09 c/litre, 59.29 c/litre and 58.53c/litre a litre respectively.” PUMP-JOCKEY WAGE DEMANDThe announcement comes a week after Wheels24 reported that fuel forecourt attendants were looking for a huge pay rise. The National Union of Metalworkers of SA is in a wage dispute with the auto industry after declaring a dispute because employers had not responded to union demands for at least R6000 a month and a R30-an-hour increase for workers earning more than R6000 a month - which would almost double that amount.