"My face is really greasy."

how can i say this "我的脸很油"in english ? My face is very oily. Ok, let me clarify. My translation is accurate if the speaker is trying to say that he/she has a lot of natural oils on his/her face. Then you would say "My face is oily" but wouldn't say "My face is greasy." If the person is eating fried chicken and got oil all over his face, then that person can say "My face is really oily." but he could also "My face is really greasy." In either case, "My face is really oily." is a better translation, as it is suitable for a variety of situations. But "My face is really greasy." is also possible, depending on the context in which it is being used. I hope this helps.

"I have greasy skin". The expression usually refers to the face. We don't say "oily face". It sounds weird.