Frugal choice for 5k OCIs on 5.4 3v

Dad ran ST 5w30 for like 3 years and 5k in their 05 F150.. still running just fine. Actually don’t think it’s been changed for two years right now I’ll have to ask. Seems like really high oci’s is what causes the issues.
 
Oh I forgot for easy changes is Havoline HM blend in the 6qt boxes. You can get 5/10w30 on walmart dot com for 2 6qt boxes for roughly $40 delivered to your home free. Very good deal, last time I bought it was $38 but I think it went up a smidge now.
 
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