Motorcycle Maintenance and Oil Information for 2009 Hyosung GT 650 R EFI Comet 647
For the 2009 Hyosung GT 650 R EFI Comet 647, the product catalog provides a starting point when choosing a lubricant. Before servicing the engine, verify the complete manufacturer specification and the procedure used to check the final oil level.
What kind of engine oil does a 2009 Hyosung GT 650 R EFI Comet 647 need?
The engine-oil grades appearing in this motorcycle's product results are 10W-40, 15W-50. The matching oil selection includes 10W-40 Synthetic Metric Motorcycle Oil, 15W-50 Synthetic Metric Motorcycle Oil. Viscosity alone does not establish full compatibility; verify the manufacturer’s oil standard.
What is the oil capacity of a 2009 Hyosung GT 650 R EFI Comet 647?
The listed engine-oil capacity for this vehicle is 3.38 quarts.

