Depending on year, either 10w-30 or 5w-30 is recommended by the factory. And they should know.
It is used as a lubricant. Ex engine oil
5w30
On a fitting right near the oil filter.
5W-30 is the preferred oil viscosity
7qts
A mechanic needs to know which oil to select for the various moving parts of a car. The oil you use in the gear box is usually a higher viscosity than the oil used in the engine. The engine uses different viscosity oils depending on the seasonal temperature.
The oil capacity of the 4.6L 32 valve Northstar in a 1997 Cadillac is 7.5 quarts.
Single viscosity is high quality oil. Mulit-viscosity oil is used for in the winter.
Yes and it is normal.
The 5 and 30 refer to the relative viscosity of the oil when it is cold (5W) and when it is hot (30W). A 5W-30 oil behaves like a 5W thin viscosity oil when the engine is cold, and it behaves like a 30W thicker viscosity oil when the engine is hot. A very thin viscosity is undesirable in a hot engine. In very high temperature situations, an even higher viscosity range, up to 50W, might be called for. Always go by the engine manufacturers recommendations.
SAE 30 full synthetic.
5.5 to 6 qts oil