Is dot 3 fluid compatible with dot 2?

DOT 3 brake fluid is generally compatible with DOT 2 fluid, as both are glycol-based and share similar chemical properties. However, it is not recommended to mix different types of brake fluids, as doing so can lead to reduced performance or potential damage to the braking system. It's best to follow the manufacturer's specifications for the recommended brake fluid type. Always ensure that the system is properly bled and maintained when switching fluids.