You may substitute 1-1/2 c crisped rice for 1-1/2 c of the oats. Preheat the oven to 350 degrees F. Coat the inside of a glass 9x12 baking dish with light vegetable oil. In a large bowl, combine the sugar, corn syrup, vegetable margarine, peanut butter and vanilla extract, and stir well to the consistency of a paste. Stir in remaining ingredients and work the mixture so that several large clumps adhere together. Using your fingers, press the mixture into the baking dish. Bake at 350 degrees for 15-20 minutes until the preparation turns golden brown. Allow to cool completely before cutting into bars.