Cut butter or margarine into 1/2 inch pieces and add to flour mixture. Process briefly until resembles coarse meal.
Add oil and 1/3 C water (without ice cube). Process 2-3 seconds untli dough begins to collect into a ball. Do not overprocess!
Remove ball of dough, lightly flour, wrap in wax paper. Place in plastic bag. Chill in refrigerator at least 2 hrs (if in hurry, try freezer 20 minutes.)