Hi,
Oversampling is not just to measure many times the same value, it's very deep and complex theory which brings you the answer what to do with the multiple samples:
1. To get higher resolution (more bits) from the conversion
2. To increase the Signal to Noise ratio (SNR)
The oversampling theory also tells you how many additional bits you can get from the samples you have (usually 4^n where n is the number of the additional bits you gain) or how much you can increase the SNR.
Actually if you simply measure 16 times the same value it's not yet oversampling and it's not sure that you'll get 2 more bits, you need also to add noise (in many cases the normal ADC noise is not suitable for oversampling) and to conform many othjer requirements.
It's a common mistake to mix oversampling with averaging (many people believe they are the same) - both look quite similar like math but it's only similarity in the calculations