Quaker 100% whole grain old fashioned oats have 4 oz of fiber and just 150 calories in each 1/2-c. Serving so you can start your day off the right way. Mix them with milk or water and cook for a few minutes in the microwave or on the stove for a delicious bowl of steaming oatmeal. Add our oats to cookies for a crunchy texture and some healthy fiber in your dessert. This jar contains 18 oz of whole grain oats.