KUALA LUMPUR: Petron Malaysia Refining Marketing Bhd( PMRMB) posted a 3.3% improvement in net profit to RM106. 4mil in the first quarter ended March 31, from RM103mil a year earlier. Its revenue surged 90% to RM3. 8bil from RM2bil a year prior.In a statement, PMRMB said it regained significant volumes, resulting in a 13% improvement in sales to 7.7 million barrels for the quarter compared to 6.8 million barrels last year. Dated Brent crude marked its highest quarterly average in the last eight y