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Refer to my chart, posted 5/28/2009, 14:38 hrs, in thread titled :"CJ-4 versus CF-2" when making a decision on what API Service Category and viscosity of oil to use in your Corvettes.
Thanks to Duke for assistance.
Good photo of the API "donut" and service categories on the back label. This is where the API donut and service category listing is for most engine oil products. If you don't see the API donut, it is not an API certified product. Beware!
...and good job on the research in the other thread. I rearranged the data to make it more readable, added the base number, and some additional verbiage.
So now you are the "designated hitter" for all future engine oil questions. I'm out.
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