You can replace the white flour with whole wheat flour if you like. It works very well that way too. This is the recipe I use for the Onion Cheese Pie recipe that I just posted. I also use it for all fruit pies.
Mix, rubbing to break apart all chunks:
1¼ cups whole wheat flour
1¼ cups white flour
1 tsp. salt
½ cup sunflower oil
⅔ cup cold water
Mix quickly into a ball. Divide into two and roll out. For a pre-baked pie shell, prick and bake @ 350° for about 15 minutes.