Preheat oven to 350° f. In a medium mixing bowl, combine flour, sugar, and salt. Drizzle oil into flour mixture; toss with fork to combine. Using a pastry blender or 2 knives, cut mixture until coarse crumbs form. Gradually add 3 tablespoons of water, stirring until dough can be gathered into a ball. (Add remaining water if nessasary) press into a disc. Wrap in waxed paper. Freeze for 20 minutes

While dough is in the freezer prepare filling. In medium bowl, whisk together in corn syrup, butter, and vanilla. Stir in pecans.

Remove dough from freezer. Roll between 2 sheets of waxed paper to a. 12-inch circle. Remove top sheet. Turn dough over into a 9-inch pie plate. Remove remaning waxed paper. Trim the excess dough, leaving a 1/2 inch overhang. Fold edges under and crimp.

Pour filling into crust. Bake until set and crust is golden, about 45 minutes. Transfer to a wire rack and cool completely