Yes, you can use Castrol engine oil in a Yamaha FZ V2.0. Castrol is a well-known brand that produces a wide range of engine oils suitable for various types of motorcycles and engines. However, it's important to choose the right type and viscosity of engine oil recommended by Yamaha for your FZ V2.0.
To ensure compatibility and optimal performance, consult the owner's manual or contact a Yamaha dealership to determine the specific engine oil specifications for your motorcycle model. The manual will provide recommendations for the appropriate viscosity grade and any other specific requirements. Following the manufacturer's guidelines will help maintain the performance and longevity of your motorcycle's engine.