Hello ! I have been using TVS Jupiter form last 4 years now. I always used synthetic oil as I was worried about my scooter condition. However, considering my low usage of the vehicle (20Km oer day), my mechanic told me to switch to cost efficient semi-synthetic oil. He recommended Divyol by gandhar oil as first preference. Has anyone using it ? Also my bike is working fine and I have not done any major modification.