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Originally Posted by Rick Parker
The GM EOS as far as I know is no longer in GM's parts books. Thank the EPA.
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It was discontinued several months ago. There's no need to use it on a regular basis. CI-4 is still available but CJ-4 is fine as well. CI-4 has 1200 PPM
Zinc and CJ-4 has 1000 PPM. This whole
oil thing is not as big of a deal as everyone tries to make it.