How will petrol diesel excise cuts, LPG subsidy impact OMC stocks? Analysts noted that OMCs have been losing money on the sale of petrol, diesel, and LPG. They believe the excise cuts should give OMCs a headroom to hike fuel prices and partially recover their under recoveries. The freeze in fuel prices in the March quarter, despite escalating global oil prices, most likely owing to state elections, led to steep under-recoveries for oil marketing companies (OMCs), said Nomura India.