Do i need to put silicone on oil gasket pan?

It's generally not necessary to apply silicone sealant on an oil pan gasket if you're using a quality gasket designed for your vehicle. Most oil pan gaskets are made to create a reliable seal on their own. However, if the gasket is damaged, or if the manufacturer's instructions specify it, a small amount of silicone can be used to enhance the seal. Always refer to your vehicle's service manual for specific recommendations.