What type of motor oil does a 1998 Chevrolet silverado use?

The recommended motor oil for a 1998 Chevrolet Silverado depends on the engine it has. There were several engine options available that year. To know for sure, you need to check your owner's manual. However, generally speaking, a 1998 Silverado would likely use:

* SAE 5W-30: This was a common viscosity grade for many engines in that era. Check your owner's manual as this might be specified for your engine.

* API Certification: Look for an oil that meets the API (American Petroleum Institute) certification specified in your owner's manual. This will likely be an "SF," "SG," or possibly "SH" rating, though likely at least "SJ" (or better) for modern equivalencies.

Do not rely solely on this information. Always check your owner's manual for the exact specifications recommended by Chevrolet for your specific Silverado's engine. The manual will tell you the correct oil type, viscosity, and API certification. The information stamped on the oil fill cap might also provide a clue.