There is an abundance of information available regarding different oil options, however, the initial step is actually quite straightforward.

Engine Oil Viscosity refers to how easily oil pours at a specified temperature. Thin oils have lower viscosity and pour more easily at low temperatures than thicker oils that have a higher viscosity. Thin oils reduce friction in engines and help engines start quickly during cold weather.

Refer to your Vehicle's Manual.

The manual for your Vehicle will indicate the recommended oil viscosity, whether it is a common type such as 5W-30 or a more unique one.