You can use a stand mixer or large bowl with a hand mixer.
Add the oil, eggs, sugar, vanilla, and pumpkin to the bowl and mix up.
When everything is mixed up, add in the flour, salt, baking powder, baking soda, cinnamon, and pumpkin pie spice. Mix until everything is incorporated.
Fold in the apples.
Pour the batter into a 9 by 13 pan and bake for 45-50 minutes.
Make sure the middle of the cake is cooked through. There are a lot of apples and it will be moist, but should not jiggle in the middle.