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.