Scrub potatoes and cut into long strips, about 1/2-inch wide.
Drop into ice water, cover and chill 1 to 2 hours.
Remove strips from water and dry thoroughly.
Place strips and oil in a deep bowl and toss until all potatoes have a light coating of oil.
Preheat oven to 475° F.
Spread fries in a single layer in a shallow baking pan.
Place in oven for 30 to 35 minutes.
Stir fries occasionally to brown on all sides.