How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Ron Z. Your Own Question
Ron Z.
Ron Z., - Chevy Tech -
Category: Chevy
Satisfied Customers: 17782
Experience:  18+yrs experience. State Inspector and Chevy Diagnostics
Type Your Chevy Question Here...
Ron Z. is online now
A new question is answered every 9 seconds

2009 Chevrolet: pickup..I use synthetic oil

Resolved Question:

I just bought a 2009 Chevrolet silverado pickup 1500 5.3. Can I use synthetic oil? If so, at what mileage do I need an oil change? Will the synthetic oil give me better gas mileage?
Submitted: 6 years ago.
Category: Chevy
Expert:  Ron Z. replied 6 years ago.



Look for three things:

  1. Use only an oil that meets GM Standard GM6094M.
  2. Temperatures above -20°F (-29°C), SAE 5W-30 is best for the vehicle. These numbers on an oil container show its viscosity, or thickness. Do not use other viscosity oils such as SAE 10W-40, SAE 20W-50 or any other viscosity grade oil not recommended.
  3. American Petroleum Institute (API) starburst symbol

Oils meeting these requirements should have the starburst symbol on the container. This symbol indicates that the oil has been certified by the American Petroleum Institute (API).

Notice: Use only engine oil identified as meeting GM Standard GM6094M and showing the American Petroleum Institute Certified For Gasoline Engines starburst symbol. Failure to use the recommended oil can result in engine damage not covered by the vehicle warranty.

If in an area of extreme cold, where the temperature falls below -20°F (-29°C), use either an SAE 5W-30 synthetic oil or an SAE 0W-30 engine oil. Both provide easier cold starting for the engine at extremely low temperatures. Always use an oil that meets the required specification, GM6094M.

Do not add anything to the oil. The recommended oils with the starburst symbol that meet GM Standard GM6094M are all that is needed for good performance and engine protection.

Engine oil system flushes are not recommended and could cause engine damage not covered by the vehicle warranty.


Synthetic oil does ot provide better gas mileage, just better protection for a longer period of time, as the viscosity breaks down slower.


Ron Z. and 5 other Chevy Specialists are ready to help you