Cadillac 2006 STS - Manual (Page 332)

What Kind of Engine Oil to Use
For V6 Engine Vehicles Only
Look for two things:
• GM6094M
Your vehicle’s engine requires oil meeting
GM Standard GM6094M. You should look for and
use only an oil that meets GM Standard GM6094M.
• SAE 5W-30
As shown in the viscosity chart, SAE 5W-30 is best
for your vehicle.
These numbers on an oil container show its
viscosity, or thickness. Do not use other viscosity
oils such as SAE 20W-50.
5-20