Yamaha recommends using mineral-based lubricating oil during the initial running-in period of a new motorcycle, including the Yamaha FZS FI. This period typically covers the first few thousand kilometers of usage, but the specific mileage may vary depending on the model and the manufacturer's guidelines.
Once the running-in period is completed, Yamaha generally allows the use of synthetic lubricating oil in their motorcycles, including the Yamaha FZS FI. Synthetic oils offer advantages such as better lubrication properties, improved engine protection, and potentially longer oil change intervals.
To determine the exact mileage at which you can switch to synthetic oil in your Yamaha FZS FI, it is best to refer to the owner's manual or contact Yamaha directly. The owner's manual provides specific instructions and recommendations for maintenance, including the type of oil to use and the appropriate intervals for oil changes. Following the manufacturer's guidelines will help ensure the optimal performance and longevity of your motorcycle.