May 7 (Bloomberg) -- Petroleos Mexicanos, the state-owned oil company, said a leak and fire at its refinery in Guanajuato state forced the shut down of a lubricant-making unit and injured two workers.

The fire broke out at 3:10 p.m. local time on May 4, Alfonso Garcia Moreno, a spokesman for Pemex, as the company is known, said in a telephone interview. The unit at the Salamanca refinery remains closed and no other units were affected by the fire, he said.

The Salamanca refinery can process 196,000 barrels of crude oil a day. Mexico, which imports about 40 percent of gasoline consumed domestically, has six refineries with a capacity to process about 1.3 million barrels of crude a day.

To contact the reporter on this story: Andres R. Martinez in Mexico City at amartinez28@bloomberg.net

Last Updated: May 7, 2008 09:15 EDT