The association has given the government 72-hour ultimatum to solve their issuesPeople wait in line at a petrol pump. — FILE PHOTOPetroleum dealers in Pakistan on Tuesday announced a shutdown of petrol pumps nationwide from Aug 15 for an indefinite period, following a wheel-jam strike by goods transporters across the country. Pakistan Petroleum Dealers Association Chairman Malik Khuda Baksh, during a press conference today alongside other association office-bearers, said the decision was taken after a meeting of dealers from across the country. Read: Petrol pump owners announce nationwide shutdown after talks with govt fail"The dealers are demanding an 8% margin on petrol. He said petrol pumps would remain closed until the dealers’ demands were met.