dexos1™ is a GM-developed engine oil
specification
that has been designed to provide the following benefits:
•
Further improve fuel economy, to meet future corporate average fuel economy (CAFE) requirements and fuel economy retention by allowing the oil to
maintain its fuel economy benefits throughout the life of the oil.
•
More robust formulations for added engine protection and aeration performance.
•
Support the GM Oil Life System, thereby minimizing the replacement of engine oil, before its life has been depleted.
•
Reduce the duplication of requirements for a large number of internal GM engine oil specifications.
Frequently Asked Questions About dexos1™ 0W20 Engine Oil
Question:
Why dexos1™ 0W20 engine oil?
Answer:
The new 5.3L and 6.2L V8 EcoTec3 engines available in the completely redesigned 2014 Silverado 1500 and Sierra 1500 pickup trucks are the most
fuel efficient and technologically advanced engines in the market.
These engines utilize an advanced combustion system that maximizes the potential of the direct injection (DI) fuel system, active fuel management (AFM),
variable valve timing (VVT), two stage oil pumps and other technologies. The dexos1™ 0W20 oil supports these technologies and is an enabler for the
improved fuel economy performance that is exhibited in these products.
Question:
Are other automobile manufacturers recommending 0W20 engine oil for their products?
Answer:
Some other manufacturers are already recommending 0W20 engine oil for their products. General Motors expects this to become an industry trend
and more automobile manufacturers will be recommending the use of 0W20 engine oil in the future.
Question:
What do the numbers 0W20 represent?
Answer:
0W20 represents the standard SAE measurement of oil viscosity. Viscosity is a measurement of the oil’s resistance to flow. The more resistant the oil
is to flow, the higher its viscosity.
Question:
If dexos1™ 0W20 oil is recommended for my vehicle’s engine, do I have to use it?
Answer:
Yes. As an example, the 5.3L and 6.2L V8 EcoTec3 engines available in the 2014 Silverado 1500 and Sierra 1500 pickup trucks, were designed,
engineered, validated and EPA certified using dexos1™ 0W20 oil. This is the
ONLY
oil approved for these engines.
Question:
What if the engine Is low on oil and dexos1™ 0W20 oil is not available to top off the oil level?
Answer:
There are many different retailers nationwide that sell GM licensed oil products that meet the dexos1™ specification. Refer to the first section in this
Bulletin: dexos 1™ and dexos 2™ Information Website
If you are unable to locate a retailer, then a GF5 Synthetic grade 0W20 oil that meets the dexos1™ specification, such as Mobil 1™ 0W-20 Advanced Fuel
Economy synthetic oil can be used.
It meets or exceeds International Lubricant Standardization and Approval Committee (ILSAC) GF-5 requirements.
Question:
Can another oil such as 5W30 that is cheaper and more widely available be used in place of dexos1™ 0W20 oil?
Answer:
No. The 5.3L and 6.2L V8 EcoTec3 engines available in the 2014 Silverado 1500 and Sierra 1500 pickup trucks were designed, engineered and
validated to run using dexos1™ 0W20 oil. This is the
ONLY
oil approved for these engines.
Question:
What if a different viscosity oil is added to the engine other than dexos1™ 0W20 oil?
Answer:
If a different viscosity oil is added to the engine other than dexos1™ 0W20 oil, GM recommends that an oil change be performed as soon as
practical, but no longer than the next scheduled oil change. in order to return the engine to the original dexos1™ 0W20 oil factory requirements.
Question:
Will using a different viscosity oil other than what is recommended damage the engine?
Answer:
It is not possible to comment on every type and viscosity of oil that is available. Some higher viscosity oils may impact engine and fuel economy
performance. Likewise for example, using a lower viscosity oil in an engine that requires 5W30 oil may not provide appropriate lubrication and may impact
engine and fuel economy performance.
Always follow GM recommendations and only use the oil specified in the GM Service Manual and/or the GM Owner Manual for the appropriate
Model Year/Vehicle/Engine.