Everyone's face is oily. Teenagers have more of an oily face because they might get pimples. Just try to wash your face more. It should help. :)
If your face is more oily, it means you have a oily skin, so there are some kinds of cream that you can find in the shop of beauty, they are specially for oily skin with some treatment.
For this, the best work is to cut off oily food from your diet or just don't eat it too much if you cant cut it off completely!
I also I have oily skin. My suggestions is to use an oil absorber and to wash your face mornings and night with your favorite products. When using make up use a powder and foundation that has no oily chemicals in it. It will decrease the pimples and help have less oil on your face through out the day. :)
This is not complicated as you will find so many good products out there. If
your skin condition is severe, I suggest that you consult a dermatologist.
Otherwise, you can simply buy yourself a Quinoderm 5 face wash. Use it two or
three times daily and it will drastically reduce the production of oil.