An Anti-Aging & Repair Serum for Oily Skin is a specialized skincare treatment designed to fight wrinkles, fine lines, and sagging while simultaneously controlling sebum production and managing acne. Formulated with a lightweight, non-comedogenic texture (often water-based or gel), it delivers active ingredients without clogging pores or leaving a greasy residue. 
While typical serums are 30ml, a “120 ml” or larger size (often 150ml) suggests a product designed for daily, long-term use or, in some cases, a high-volume “Booster” or toner serum like the COSRX 6 Peptide Skin Booster Serum. 

Key Components of an Anti-Aging Serum for Oily Skin
Active Ingredients: Niacinamide (regulates oil), Retinol (collagen production/cell turnover), Salicylic Acid (unclogs pores), and Vitamin C (brightening/antioxidant).
Hydration Agents: Hyaluronic Acid (provides weightless hydration).
Anti-Aging Agents: Peptides (firming), Bakuchiol (retinol alternative). 

Top Recommended Products for Oily/Aging Skin
Based on the provided search results, these are leading serums fitting this description:
La Roche-Posay Pure 12% Vitamin C Oil Control Serum: Formulated with 12% Vitamin C, Salicylic Acid, and Neurosensine. It is designed to rebalance oil, boost radiance, and reduce wrinkles for oily/combination skin.
COSRX The 6 Peptide Skin Booster Serum (150ml): A lightweight, non-sticky booster that reduces sebum, improves elasticity, and acts as a first-step serum.
The Ordinary Niacinamide 10% + Zinc 1% (Often available in larger 120ml sizes): A staple for oily, blemish-prone skin that balances sebum, reduces pore appearance, and treats early signs of aging.
CeraVe Resurfacing Retinol Serum: A lightweight, non-greasy gel-serum that uses encapsulated retinol to smooth skin texture and fade post-acne marks. 

Benefits
Oil Control & Matifying: Reduces excess shine.
Wrinkle & Pore Reduction: Minimizes the appearance of pores and fine lines.
Skin Barrier Repair: Strengthens the skin barrier using ceramides or niacinamide.
Faster Cell Renewal: Retinol-based serums accelerate skin regeneration. 

How to Use
Cleanse: Start with a clean, dry face.
Apply: Apply 2–3 drops to the face and neck, focusing on areas with fine lines or excess oil.
Layer: Follow with a lightweight, oil-free moisturizer.
SPF: Apply sunscreen in the morning, especially if using retinol.