Preheat the oven to 350.
Lightly grease doughnut pan.
Combine the oil, eggs, sugar, pumpkin, spices, salt, and baking powder. Mix until blended.
Add in the flour, stirring until blended.
Use a piping bag or zippered bag to fill each donut shape about ¾ full.
Bake the doughnuts for 18 minutes or until a toothpick inserted into the center comes out clean.
Allow to cool in pan for 5 minutes then use a butter knife to gently loosen each from the pan.
Transfer to a rack.
Sprinkle each with cinnamon sugar while still warm.
Allow to finish cooling on the rack.