Preheat the oven to 350°F (175°C) and grease a 9x5-inch loaf pan thoroughly.
In a large mixing bowl, combine the flour, cinnamon, baking soda, and salt, mixing well to distribute the dry ingredients evenly.
In a separate medium bowl, whisk together the oil, sugar, eggs, and vanilla extract until the mixture is smooth and cohesive. Incorporate the grated zucchini into this wet mixture.
Gently fold the wet ingredients into the dry mixture, stirring only until no streaks of flour remain. Avoid overmixing.
Transfer the batter to the prepared loaf pan, smoothing the top evenly.
Bake for 60 to 65 minutes, or until a toothpick inserted into the center of the loaf emerges clean.