Heat an electric griddle to 350 deg. (I don't grease my griddle because it's non-stick. You can grease your griddle if you need to, or if it makes you feel better.)
Shake the container of mix and measure the mix into a medium bowl. In a separate bowl (I use a 4 cup glass measuring cup), whisk the buttermilk, eggs, and oil together until completely combined. Add mixture to pancake mix and mix with a rubber spatula until the batter is combined but is still a little lumpy.
Use a muffin scoop, or measure 1/4 cup batter onto the hot griddle for each pancake. (This batter is thick, and you need to use the back of the scoop to gently spread it out a little.) Cook until bubbles form on the surface of the pancakes and the edges start to look dry, about 3 minutes. Flip the pancakes over and cook until golden brown, about 3 more minutes.
All griddles are not created equal. If you find the 350 deg. setting on your griddle is too hot or not hot enough, adjust your temperature accordingly.