In a medium-sized pot, such as a caldero or Dutch oven, combine the water, oil, and salt over medium-high heat. Bring the mixture to a boil. (Optional: preheat the water using an electric kettle before adding it to the pot for faster cooking.)
4 cups long-grain white rice
Put long-grain rice in a bowl or fine-mesh sieve and rinse under cold water until the water runs clear. This step helps the rice stay fluffy instead of clumping together when cooked.
3 tablespoons oil, 3 ½ teaspoons salt, 4 ¼ cups water
When the water is boiling, add the rinsed rice to the pot. Stir the rice to distribute it evenly in the water. Let it simmer uncovered until the water almost entirely evaporates (about 5-7 minutes).
4 cups long-grain white rice
Once the water has mostly evaporated, reduce the heat to low. Cover the pot and let the rice cook for about 25-30 minutes.
After 25-30 minutes, open the pot and use a spoon to gently flip the rice, bringing the bottom layer to the top. If the rice is still firm, cook for an additional 5 minutes. Once light and fluffy, remove it and put it on a serving dish.