I have always used 3 to 1 also. I also add 1 T vinegar and 5 T water with 1 egg beaten in. Makes the best crust.
That being said here is a recipe for pie crust using oil that a friend gave me years ago and it rivals my lard crust, believe it or not. It is easier too since it is rolled between two sheets of waxed paper.
Oil Pie Crust
1 ¾ cups flour
1 teaspoon salt
½ cup plus 2 Tablespoons oil
3 Tablespoons cold water
¼ teaspoon almond or vanilla extract, optional
Roll into 2 balls and then roll out between two sheets of waxed paper. Yield 2 crusts