oil grade

[kmanharp]

hi guys kman here i hav a roketa 200 with a new lifan 200 motor with about 500 mile i run vavoline 10-40 motorcycle oil would 20-w 50 be better i live nc and i ride 30 miles work need some in put thamks kman

[SpudRider]

In the heat of a North Carolina summer, the 20W/50 engine oil is probably a good choice. However, the 10W/40 motor oil is also very good. I use 15W/40, commercial, diesel motor oil in all my motorcycles. :)