Preheat griddle to 350 degrees.
In a medium bowl, beat egg whites until soft peaks form.
Begin sprinkling in the sugar and beating until all the sugar is incorporated. Continue beating until stiff peaks form; set aside.
In a separate cup, combine baking soda and water; set aside.
In a separate large mixing bowl, combine starter, flour, egg yolks, oil and salt. Mix well to combine.
Fold in beaten egg whites into the batter. Gently fold to combine.
Right before ready to cook, stir in baking soda water mixture, mix well (batter will foam up).
Fold a sheet of paper towel in half, and moisten with oil; rub griddle with oiled paper towel.
Ladle about 1/4 cup of batter onto hot griddle, using the back of the spoon to spread batter into a round.
Cook until surface of pancakes have bubbles all over and some have burst, 1 to 2 minutes.
Flip carefully with a thin spatula, and cook until browned on the underside, 1 to 2 minutes more.
Transfer to a baking sheet; cover loosely with aluminum foil, and Keep warm in oven heated to 275 degrees.