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Here are some numbers from my oil just before I did a top end rebuild. I'm thinking everything is looking pretty good. Any other thoughts? This engine had right at 249K miles on it when this sample was taken. Fe 29 Cr 12 Pb 3 Cu 5 Sn 0 Al 6 Ni 0 Ag 0 Si 15 B 2 Na 5 Mg 21 Ca 3793 Ba 0 P 1138 Zn...