YOU SAID:
I want to wash my face because my face get oily.
INTO JAPANESE
顔が脂っこくなったので顔を洗いたい。
BACK INTO ENGLISH
I want to wash my face because my face is greasy.
INTO JAPANESE
顔が脂っこいので顔を洗いたいです。
BACK INTO ENGLISH
I want to wash my face because my face is greasy.
You've done this before, haven't you.