The short answer: Dexos1 Gen 2 motor oil, typically in a 0W-20 or 5W-30 viscosity, depending on climate and driving conditions. Always use a Dexos1 Gen 2-certified oil and follow GM’s viscosity guidance in the owner's manual.
For the 2013 Silverado 1500 with the 5.3-liter V8, GM’s specification centers on the Dexos1 Gen 2 standard. This means you’ll be using a synthetic or synthetic-blend oil that carries the Dexos1 Gen 2 certification, with the exact viscosity determined by climate and usage. The official guidance is found in the owner’s manual and the under-hood sticker.
Oil specifications for the 5.3L V8
The core requirement for this engine is Dexos1 Gen 2 certification. In practice, this translates to choosing a Dexos1 Gen 2 oil in one of a couple of approved viscosities, as specified by GM for your climate and driving habits.
Common viscosity options for Dexos1 Gen 2 on this engine:
- 0W-20 Dexos1 Gen 2 (synthetic or synthetic blend) — favored for fuel economy and cold-start performance.
- 5W-30 Dexos1 Gen 2 (synthetic or synthetic blend) — approved and sometimes preferred in hotter climates or for heavier use.
Whichever option you choose, ensure the product explicitly states Dexos1 Gen 2 on the label and follow the vehicle’s recommended service interval in the owner’s manual.
Notes for climate and usage
In general, 0W-20 is common for everyday driving in milder climates, while 5W-30 may be better for extreme heat, towing, or heavy-duty use. Always verify with the manual or your GM dealer to confirm the exact viscosity for your situation.
Summary
The 2013 Silverado 1500 with the 5.3L V8 takes Dexos1 Gen 2 motor oil, with approved viscosities typically including 0W-20 and 5W-30. Use Dexos1 Gen 2-certified oil and adhere to the viscosity guidance provided in the owner's manual for best performance and warranty compliance.