I make oil pie crusts frequently. After experimenting with many recipes, I hit upon a combination of ingredients that works well for a 9 inch pyrex pie plate. I use a scale to measure flour and a pyrex liquid measuring cup. These work well for me and always yield consistent results. This recipe is for a single 9 inch pie crust.
1 1/2 cups AP flour (6.75 ounces)
1/2 tbsp. sugar
1/2 tsp. salt
1/3 cup vegetable oil (I use canola or safflower oil) plus 1 tbsp
4-6 tbsps. ice water (maybe a little more if necessary)
In a medium size bowl, combine flour, salt, sugar. Add oil and 4 tbsps. ice water and mix with a fork. Your dough should start to look soft and crumbly. If dough is looking dry after the addition of 4 tbsps water, then add water, a tablespoon at a time, until just about all flour is coated and holds together when pressed between your fingers. Form into a ball. You may have some stray dry bits of flour at bottom of bowl which you can either press into the dough or mix with a tad bit of water, then press into the dough. Ball of dough should not be greasy feeling nor dry and crumbly. Do not over handle. Your dough is ready for rolling. I now refer you to YouTube (how to make oil pie crusts) where you can watch many home bakers and pros roll out the dough and transfer to pie plates. I have my own method, but typing it out is a bit lengthy and this post is already long. I use a combination of methods I learned from the site. The recipe above has never failed me, so I hope it works for you.