Your mileage i.e 92000 kms in just 5 years shows that the car has been used a lot i.e 18000kms a year or 50kms a day. When the cars are driven at such pace they are prone to heatup issues. Are you sure the car has never been overheated in all its life. If it has been overheated than this is the reason for oil change.
And for the gods sake, stop thinking that if a car is throwing water its engine is perfect, Water throwing depends upon the mixture of air fuel if its correct the car will drop water. Although it is correct that an engine that is in a poor shape will not throw water, but an engine that is 85%-75% healthy can also throw water. So please stop guaging the health engine via water drop