However, generally speaking, a modern Chevy Tahoe V8 will likely recommend using:
* 5W-30 or 0W-30: These are common viscosity grades for many newer vehicles. The "W" stands for winter, and the lower the number before it, the better the oil's flow in cold temperatures. The number after the "W" indicates the oil's viscosity at higher temperatures.
* Synthetic blend or full synthetic: Synthetic oils generally offer better performance and protection than conventional oils, especially in extreme temperatures or demanding driving conditions. Your owner's manual might specify a preference.
* API certification: Look for the API (American Petroleum Institute) certification mark on the oil bottle. This ensures the oil meets certain quality standards. Your owner's manual will likely list the specific API certification(s) recommended for your Tahoe. For example, you might see SN Plus, SP, or newer certifications.
In short: Don't rely solely on this information. Check your owner's manual! It will provide the definitive answer based on your specific vehicle's engine and recommended service intervals. Using the wrong oil can harm your engine.
