McDonald's

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, the world's largest fast-food restaurant operator, announced plans to reduce the amount of fat in its French fries.

The company, headquartered in Oak Brook, Ill., said in a press release Tuesday that it will introduce a new cooking oil at its 13,000 domestic restaurants, using it to fry Chicken McNuggets, Filet-o-Fish, hash browns, crispy chicken sandwiches, and its French fries.

The cooking oil will reduce trans fatty acids by 48% and cut saturated fat by 16%, the company said. The new oil is expected to launch in October 2002 and be in all McDonald's U.S. restaurants by February 2003.

McDonald's shares closed at $23.76 on Friday.