If you have oily skin and don't already use a serum, then your skin is missing out on great benefits. Many actives in serums are perfect for curtailing the symptoms of oily skin.
An oily skin type is a blessing in disguise. Oily skin is resilient, well protected from signs of ageing, and rarely suffers from sensitivity.
Despite all the benefits of an oily skin type, the excess of natural sebum can make you want to fight against it. This is a tactic to avoid.
Instead, you should find a middle ground, and serums can help you do just that.