21.   Refining margins are also improving and will improve further into spring and summer, because gasoline inventories are very low and demand is very strong.

22.   Refining margins are the difference between the cost of a barrel of crude oil and the price at which products made from it can be sold.

23.   Refining margins are the difference between the cost of a barrel of crude oil and the price at which the products made from the oil can be sold.

24.   Refining margins are the difference between the cost of a barrel of oil and the price at which products made from it can be sold.

25.   Refining margins continued to improve during the third quarter in Europe, Asia and the U.S. West Coast, according to Salomon Brothers International.

26.   Refining margins have declined with the runup in crude oil prices and the inability of marketers to fully pass the increases on to consumers.

27.   Refining margins have remained weak because of intense competition.

28.   Refining margins are difference between the cost of a barrel of crude oil and price at which refined products can be sold.

29.   Refining margins are the difference between the cost of a barrel of oil and the price at which the refined products made from it can be sold.

30.   Refining margins are the difference between what a company pays for a barrel of oil and the price at which it can sell products made from the oil.