71.   Unocal holds patents for some kinds of reformulated gasoline.

72.   A drop in reformulated gasoline stockpiles just ahead of summer driving season heightened concerns of a supply crunch and was the trigger for the rally Wednesday.

73.   Cleaner-burning reformulated gasoline is required in one-third of the country in heavily polluted urban areas.

74.   Cleaner burning reformulated gasoline is required in one-third of the country, in heavily polluted urban areas.

75.   Farmers argue that without a federal mandate, ethanol would be prevented from having a significant share of the reformulated gasoline market.

76.   Gasoline futures rallied Thursday amid reports of refinery glitches and confusion over a recommendation by the Bush administration on reformulated gasoline supplies.

77.   He said the market was also eyeing low stocks of reformulated gasoline.

78.   Instead, Bush directed the Environmental Protection Agency to review whether special blends of reformulated gasoline can be swapped among urban areas to combat supply shortages and rising prices.

79.   Meanwhile, despite healthy builds this week in products inventories, especially key reformulated gasoline supplies, analysts say prices are poised to rise next week.

80.   MTBE, an additive used to make some reformulated gasoline, is made from methanol, a derivative of natural gas.