mobil 0w20 vs amsoil 5w20

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Please educate me: I was under the impression the XL-7500 Amsoil products (XLF & XLT) were designed for warranty accomodation with 6 mo. change intervals for vehicles like new Corvettes, etc.

Perhaps what I'm trying to say is "situations where extended change intervals are not desired nor anticipated, either in terms of miles or time"?

This vs. the ASL, ATM, AMO, ARO, HDD, TSO, AME, ACD, etc.
 
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