1985-1990 Suzuki LT50 Service Manual, Page 115Get this manual
L T50J ('8B-MOOEL)
S PECIFICA nON
Use only unleaded or low lead type gasoline of at least 85 95 pump octane (R'M method)89 oc tane or higher rated by research method
Fuel type
Fuel tank capacity Engine oil type
Gasoline used should be graded 85 95 oclane higherAn unleaded or low -lead type
gasoline IS recommended