What's the 2003 infiniti g35 engine oil type?

The 2003 INFINITI G35 engine oil recommended is the SAE 5w-30 synthetic motor oil stated by the owners manual. Some quick facts You may or may not know regarding engine oil. The "w" in motor oil stands for winter. For example, A5W- motor oil will flow better at lower temperatures than a 15W- motor oil. The higher number, following the w refers to hot weather viscosity, or how fluid Your oil is at hot temperatures. The higher the number, the thicker the oil at a specified temperature.There are also 11 viscosity grades of oil which are 0W, 5W, 10W, 15W, 20W, 25W, 20, 30, 40, 50, and 60. In the United States, these numbers are often referred to as the "weight" of a motor oil, and single-grade motor oils are often called "straight-weight" oils.