BOB:
Good morning. Bob, just add a combination of a milk product & water mixed to the dry ingredients till you reach the consistency that you would like. You can vary the relationship between the milk & water as it pleases you. You can use all milk or all buttermilk as well. Find the consistency that pleases you that is the key my frisnd. Now then Bob, about the veg. oil. The reason for the oil is we will assume you will employ a electric griddle. You do not need to coat the griddle with a spray of sorts. Just dump your your pancake concoction on the griddle measured & do your thing. 1 Tbls of oil will suffice. Good luck & have a nice day my friend.
~Chef Dunask.

IHOP Harvest Grain and Nut Pancakes (complete recipe)