If zucchini is not yet shredded, do this first! If you have more than 3 cups packed, that's ok. I wouldn't use over 3.5 cups of shredded zucchini for this recipe.
Mix together eggs, oil, sugars, vanilla, salt, and cinnamon until well combined.
Add zucchini and mix.
Add flour, baking soda, and baking powder. Mix until batter is just a little streaky.
Add in the oats and continue mixing until just combined.
Divide into loaf pans and bake at 350F for about 60 minutes until a toothpick comes out clean. Tent with foil if the tops brown too quickly.