Pour milk and oil into a bowl, do not stir. Add all at once to flour. If the dough is sticky add 1/4 cup more flour.
Stir until mixed and shape into 2 flat balls. Wrap in plastic wrap and chill for 1/2 an hour.
Lay one dough onto plastic wrap, sprinkle some flour on plastic wrap and on top of dough and lay another piece on top. Roll out with a rolling pin as large as your pie dish is.
Spray your pie plate with nonstick cooking spray, take the top piece off and flip over into the pie dish, pressing dough all around.
Prick the bottom of the dough with a fork. Cut off the excess so the crust is flush with the rim.
Roll out second dough to use as the top of your pie.