Quick Answer
Vegetable Oil does not use the same grams-to-cups value as every other ingredient. Using a practical US cup reference, 218 grams of vegetable oil is about 1 cup.
That means 100 grams of vegetable oil is about 0.46 cups, while 200 grams is about 0.92 cups.
Vegetable oil is similar in density to olive oil, with one cup weighing around 218 grams depending on the specific oil blend.