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I hit a little over 1000 on a trip to Houston for Thanksgiving, took it in on Tuesday right after reading this post, service Mgr said they had not been notified of this from GM but better safe to change out the break in oil and get the Mobile 1 full synthetic in there.
I spoke to my buddy who has a Z51 convertible and he said that he had seen an article where GM said that all the current cars coming off the line would not have a break in oil, only full synthetic ..........??
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