For the Yamaha FZ V3.0 FI, the manufacturer typically recommends using a 10W-40 grade engine oil. However, it's essential to consult the owner's manual or contact an authorized Yamaha dealer to confirm the specific oil recommendation for your motorcycle model, as manufacturer specifications can vary. The owner's manual will provide the most accurate and up-to-date information regarding the suitable engine oil for your Yamaha FZ V3.0 FI.