synthetic oil
#6
Originally Posted by 07 z71 silverado
i was told by a mechanic that to wait until about 10k until putting some in because the rings arent broken in yet.
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#8
idk about the break in from the factory thing... but ya you dont need 10k miles for the rings to set in.. you'll be okay to put in syntheic now probably.. how many miles do you have?


