I mean 10W or 20W or more and what is the impact of these on engine for CD100 SS?
The quality of engine oil used in the engine determines whether the engine will have a sludge free long life or a problematic end. You should use SAE 10W30 MA engine oil from Honda, which promises a friction free, sludge proof engine life. It not just increases the engine life, it provides lesser emissions, making it an environment friendly choice. You can get your vehicle serviced from a genuine Honda service center and they will use the same engine oil, certified from Japanese Automobile Standard Organization. The oil has been specially defined for use in commuter bikes, making it the best choice for your CD100 SS.