In a large bowl combine overnight starter ingredients. Cover with waxed paper or a cloth. Set in a warm place free from drafts. Let stand overnight or for 24 hours. Next morning, remove 1/2 cup sourdough starter and add back to original starter. In a small bowl, combine sugar, salt and baking powder. Stir into remaining sourdough starter mixture. Stir in oil. Add eggs; beat well. In a small bowl, combine baking soda and water. Gently fold baking soda mixture into sourdough mixture. Do not stir after baking soda has been added. Preheat griddle to 400F. For each pancake, pour 1/4 to 1/2 cup batter onto hot griddle. Cook 1 to 2 minutes on each side or until golden brown.