What's the 2001 Cadillac DeVille oil type?

For best results, GM suggest using the sae 5w-30 motor oil. The 2001 Cadillac DeVille, which houses a powerhouse of A4.6L engine, makes best use of a fully synthetic motor oil, although semi-synthetic and conventional oils are also viable. This is because fully synthetic oils offer a greater degree of protection, efficiency and performance and so, offer more longevity and performance than a semi-synthetic alternative. GM recommends changing both the motor oil, as well as the oil filter every 3,000 to 5,000 miles if using a more conventional oil. If using a synthetic oil, be it fully synthetic or semi-synthetic, GM suggests changing the oil and the filter every 7,500 to 10,000 miles.