Preheat oven to 350°F
Whisk together flour, pumpkin pie spice, baking soda, baking powder and salt.
With whisk attachment, beat together butter, oil, and sugars on medium low speed until fluffy and light in color.
Turn mixer down to low and add in eggs, one at a time, until incorporated.
Add in pumpkin puree and mix until mostly combined. Mixture will look separated and not homogenous.
Add in dry ingredients, turn on mixer low, and slowly drizzle in milk. Mix until a few dry bits remain. Do not overmix.
Remove bowl from mixer and use a rubber spatula to finish mixing batter.
Bake for 35-45 minutes, rotating pan halfway through. Cake is done when it is golden brown and inserted toothpick comes out clean.