10w30
The crank case say 2.4 liters.
Standard 10w40 or 10w30.
10w30 synthetic would be the best you can use.
10w30 10w30
A 1982 Suzuki GS550 holds approximately 3.5 quarts of oil. The type of oil used depends on the location of the motorcycle. Colder environments call for different viscosity of oil to be used.
SAE 10w30 any major brand.
10w30 is thicker than 5w20
10w30
SAE 10W30 or yamalube 10w30
5w30 or 10w30
10w30 if using regular oil. I recommnd Spectro 10w30 clutch saver oil.