Preheat your oven to 350°F (175°C).
In a large mixing bowl, combine the chopped rhubarb and sugar. Let it sit for about 10 minutes.
Add the vegetable oil and vanilla extract to the rhubarb mixture. Stir well.
In a separate bowl, whisk together the flour, baking soda, and salt.
Gradually add the dry ingredients to the wet mixture, stirring until just combined.
Pour the batter into a greased loaf pan.
Bake for 60 minutes, or until a toothpick inserted into the center comes out clean.
Let the bread cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.