Of course you want to wash your face when it looks like you've smeared olive oil all over it. But doing it 20 times a day in scalding water with a chemical-smelling, harsh cleanser isn't going to work -- it actually makes it worse.
You can certainly get your skin nice and dry that way. Too dry. And then your usually well-oiled skin will start freaking out because you've quite literally irritated it. As a result, your body ratchets up oil production to try to protect itself from whatever is attacking it: i.e., you.
Oily skin and acne are all too often BFFs, as well. If you have acne, it's even more important not to scrub away at your face with gritty exfoliants and zillion-percent benzoyl peroxide washes. You have to be nice to it, instead. Use warm water and a gentle cleanser, and then schedule a trip to the dermatologist. Some cases of acne simply can't be treated effectively with over-the-counter products, and the answer to your skin problem may be as easy as picking up a prescription for an oral antibiotic or topical cream.