By DANIEL KHOO
danielkhoo@thestar.com.my
KUALA LUMPUR: Petroliam Nasional Bhd (Petronas) posted a 53.8% jump in net profit to RM18.3bil for its second quarter ended Sept 30, 2011 from RM11.9bil a year ago due to higher prices across its product range. However, the impact of the better prices was partially offset by the stronger ringgit against the US dollar.