Based on the reviews, the DIVE IN Low Molecular Hyaluronic Acid Cleansing Foam by Torriden has mixed feedback regarding its effectiveness for oily skin. Some users with oily skin have reported positive experiences, noting that the cleanser is gentle and doesn't cause irritation. However, others have mentioned that the cleansing effectiveness might be a bit weak for those with oily skin, suggesting that it may not be as effective at removing excess oil and sebum. It's recommended to use it as a second cleanse or pair it with other products for better results.