Motorcycle Maintenance and Oil Information for 2009 Hyosung GT 650 S EFI Comet 647
An oil purchase for the 2009 Hyosung GT 650 S EFI Comet 647 should be guided by the exact motorcycle application. Confirm the manufacturer’s lubricant requirements before relying on a catalog match, and check the oil level after the service.
What kind of oil does a 2009 Hyosung GT 650 S EFI Comet 647 take?
The listed engine-oil viscosities for this application are 10W-40, 15W-50. Catalog-matched oil products include 10W-40 Synthetic Metric Motorcycle Oil, 15W-50 Synthetic Metric Motorcycle Oil. Check the owner’s manual for any additional oil requirements beyond the listed viscosity.
How much oil does a 2009 Hyosung GT 650 S EFI Comet 647 take?
The listed engine-oil capacity for this vehicle is 3.38 quarts.

