LAHORE (PPI) The National Refinery Limited (NRL) has shown 16 percent growth in its volumetric sales, as shortage of POL products over past three months and fault at ATRL, led NRL to increase its utilization levels. Experts said that the increased volumetric sales of NRL over FY11 translated into 3 percent increase in market share in favour of NRL. ATRL on the other hand increased its market share in SKO and JP sales by 11 percent and 6 percent respectively. FO being the only energy product with negative GRMs, reduction of its contribution towards the product mix of ATRL bodes well for the company. However, an increase in FOs share in the product mix of NRL will hurt the companys earnings. Industry witnessed 97 percent increase in GRMs backed by rising crude oil prices.