Here's the content of ZDDP and Phos. in
Amsoil:
AMSOIL Synthetic Motor Oils Phosphorus
Zinc Level
Level (ppm) (ppm)
AMO 10W-40
Synthetic
Premium Protection Motor
Oil 1265 1378
ARO 20W-50
Synthetic
Premium Protection Motor
Oil 1266 1379
HDD Series 3000 Synthetic
5W-30 Heavy Duty Diesel
Oil 1266 1379
AME 15W-40 Synthetic Heavy
Duty Diesel and Marine Motor Oil 1267 1377
AMSOIL Synthetic Racing Oils Phosphorus
Zinc Level
Level (ppm) (ppm)
RD20 Dominator Synthetic
Racing Oil 5W-20 1424 1575
RD30 Dominator Synthetic
Racing Oil 10W-30 1424 1575
RD50 Dominator Synthetic
Racing Oil 15W-50 1424 1575
AHR SAE 60 Synthetic Super
Heavy Weight Racing Oil 1265
How does that compare to the oils mentioned earlier in this thread?