Thread: '72 Cheyenne K10
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Old 01-29-2022, 11:13 AM   #456
jimbosprint
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Re: '72 Cheyenne K10
Quote:
Originally Posted by Jiggers72-GMC View Post
Right on Jim, what's in that bottle beside the oil filter ?
Red Line 81403. It's a break-in additive with zinc for the flat tappet cam. I use half a bottle with each oil change.
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