Thank you, Sir.
This is enlightening.
I remember GN is the original factory fill?
100 mileage shows a viscosity of 20wt oil, which indicates the orgingal is nearly a 20wt.
I currently use 40wt on my Honda scooter, viscosity is 14.2.
Based on this report, I would boldly change to 30wt oil, say, Mobil 5W-30 viscosity is 11.
This is enlightening.
I remember GN is the original factory fill?
100 mileage shows a viscosity of 20wt oil, which indicates the orgingal is nearly a 20wt.
I currently use 40wt on my Honda scooter, viscosity is 14.2.
Based on this report, I would boldly change to 30wt oil, say, Mobil 5W-30 viscosity is 11.