"Oiliness" refers to the condition or quality of being oily, which means having a greasy or slick texture or appearance due to the presence of oil. Full definition
Since I started using OTC Differin a week ago, I've noticed the level of oiliness of my face to be decreased significantly (that feels great). (differin.com)
I've always struggled with oiliness in my T - Zone and larger pores, so having products that smooth out my skin and leave a matte finish are a must. (mywhitet.com)
The defatted flakes I'm referring to are high in protein, but reduced in oiliness. (lifespa.com)