There are many side effects to an increased oil volume.
Off the top of my head, I'm thinking....larger sump (pan) & larger drain jounals in the head & oil filter to keep up with the flow...pressure regulation...etc....etc

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'83 300 TD..."Helga" Norse for holy... a liittle rust problem
'85 300 TD...A $200 rear-ended total..being transformed into a pick-up truck
'68 Ford Ranchero GT...a pick-up truck that Ford transformed from their wagon