Suzuki recommends using their own brand of engine oil for their motorcycles, including the Suzuki Gixxer. It is advisable to follow the manufacturer's recommendations and use the oil specified in the owner's manual. The specific grade and type of engine oil suitable for the Suzuki Gixxer may vary depending on the model year and regional specifications.
Typically, Suzuki motorcycles, including the Gixxer, use a 10W-40 grade oil. However, it is always recommended to refer to the owner's manual or consult an authorized Suzuki service center for the most accurate and up-to-date information regarding the recommended engine oil for your particular Gixxer model. They can provide you with the appropriate oil specifications and guide you towards the best choice for your motorcycle.