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    Using an older rated API in a reman engine for a older vehicle

    I agree maybe just not use it unless it’s some old junk, so my other question is. What is the best conventional motor oil to break the new engine in with as they recommend not using synthetic for the first 5-6000 miles.
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    Using an older rated API in a reman engine for a older vehicle

    Honestly I have never checked for sediment in the bottom of them. I have been using it in the 94 TBI 350 going on 4 years and about 20,000 miles and hasn’t hurt it a bit.
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    Using an older rated API in a reman engine for a older vehicle

    My question is that I am currently in the process of installing a new reman 5.7 vortec engine in a 1996 k2500. My grandma had bought cases and cases of amoco ultimate good 5w-30 conventional motor oil back in the 90s. Now I have been using this regularly in my 1994 Chevy k1500. I am wondering if...
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