Which is the best engine oil for Jupiter?

There are some good brands like Motul, Castrol etc and one can buy them from online stores like Amazon or Flipkart etc. The most common and effective engine oil recommended for bikes like Jupiter are in the specification range 10 W 30 to 10 W 50. Here, the first number in 10 W 30/50 means that it has a viscosity of 10 in cold conditions and 30 or 50 in hot condition. So the oil in this range is suitable for these type of bikes.