I dont think its an issue. While it can free up gunk, one could use an additive such as Seafoam before the change over. That way most of the gunk will end up in the old oil.

Also, 3K oil changes are not recommended or needed in a gaser, not sure about a tractor engine. But I would check up on that. Might be throwing $$ away.

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1991 560 SEL / 185k miles
1992 750il / 17k miles - project car