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2008 Silverado and oil


2008 Silverado and oil.  

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Hello, I was talking to coworkers and we had an issue that you all out there might be able to help with, I have a 2008 Silverado with a 5.3 cast iron block with AFM, the debate, 1 would it be better to run the newer Dexos oil 5W30 of course or factory recommended GM6094M? 2 would synthetic oil either formula be better and which Dexos or GM6094M?

Thank you for your time and response.

Ron

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Ron,

 

There is no Dexos "conventional" oil,dexos is a synthetic blend oil only.

 

GM6094M is a spec. that could be either or....

 

"The General Motors oil specification in question, GM6094M, denotes specific loads and temperatures to be met in the test lab.Independent research has not uncovered the specific goals of GM6094M, but quickly showed that many synthetic and mineral based oils meet the requirements, so there is nothing too exotic about this engine oil requirements. Both Havoline (mineral) and Redline (synthetic) 5W-30 oils meet this specification, for example, so a number of oils should work"

GM4718M is the synthetic spec GM oil.

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txab pretty much summed it up for you. The only advantage to installing a synthetic is if you want to go to extended drains. That and if you live in an area that has extreme cold or heat. Then you get better protection that the synthetic can offer over a conventional.

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GM4718M is General Motors' High Performance engine oil specification. Oils which meet GM4718M tend to be made from synthetic base stocks, so it is often referred to as a "synthetic" specification.

 

Dexos1 superceeds the GM6094M & GM4718M spec.

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