i messed up my pancake batter! how to improve it ?

Depending on the type of pancake butter in most cases it still should turn out ok without added butter or oil.

I hate to admit it, but there have been a number of times that i have forgot to add some critical ingredient to a cake, pancake, etc. batter.I use a rubber spatula to put back the batter in its bowl; then i add the missed ingredient , using whatever method the recipe requires; then i continue with the cooking/baking etc. in a new pan (or the used pan, cleaned and dried and prepared.) ** The important thing here is that you do not want to 'overwork' your batter etc. So, add the missing ingredient quickly.

A pancake batter is more or less "dump and stir". Why didn't you just fold the oil in when you realized you had missed it? The batter would be a little overworked, but at least the ingredients would have been correct.

I like to use melted butter vs oil..and incorporate the butter into the rest of the wet ingredients.