Place the flour and salt in a large bowl, and whisk to combine.
Add the oil, stirring until the mixture resembles coarse crumbs.
Cut the butter into thin slices and toss in the flour mixture to coat.
Dribble ice water in, a tablespoon at a time, mixing just until the mixture can hold its shape. (You may need slightly more or less water.)
Tumble the dough out of the bowl and onto a large sheet of plastic wrap.
Use the plastic wrap to gather the dough into a disc shape, then wrap the dough tightly and press down on it firmly to compact it.
Chill the dough in the refrigerator for 1 hour.
Flour the work surface, rolling pin, and the chilled dough lightly, then roll out to 1/4-inch thickness, and fold into thirds. Give it a quarter-turn, fold into thirds again, then repeat one more time.
Refrigerate for one more hour,
Roll out the pie crust dough to a little larger than the width of your pie pan and gently nestle it in, allowing any excess to drape over the sides.
Trim, fold under, and crimp the edge, then chill.