My conclusion?
None of the aforementioned brands/weights/origin of oils will hurt my engine. Only traffic jams hurts my motor when I have to go so slow (with apologies to James Taylor).
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1977 924 Guards Red (parted and sold)
1987 924s Alpine White (sold)
1987 924s Kopenhagen Blue (my Lowencash tribute track car -- sold)
1987 924s Garnet Red (currently becoming Lowencash II)
1982 928 Silver (sold)
