Rub the pan with oil but don't pour the oil. Preheat the pan on medium high heat. If using a newer non stick pan, you may not need to grease the pan but if you will be using a regular pan, you will need to rub the pan with oil before every crape. (You can pour some oil on a piece of paper towel.)
Combine flour, eggs, milk, oil, salt, sugar and baking soda. Whisk all well.
Slowly, start adding 1/4 cup of the hot water at a time to the batter. Whisking constantly until the batter reaches the consistency of melted ice cream.
Pour about half a ladle into the hot pan and swirl slowly.