I did some looking around, here are the zinc contents of some common oils.
Delo 400 Multigrade 15/40 (the older good stuff)
1480 ppm
Delo 400 LE 15/40 (the new stuff)
1300 ppm
Lucas High TBN 15/40
1400 ppm
Redline 20/50(CF)
1330 ppm
Redline 15/40
1320
that is allI have for now
COMP Cams recomends over 1200 ppm
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