Quote:

Royal Purple: 800-900ppm



Here is what Petroleum Quality Institute of America (PQIA) recently reported for:

Royal Purple Synthetic Oil 5W-30 API SN ILSAC GF-5.

Phosphorus 706ppm
Zinc 837ppm

For more, click on this link - HERE

- AND -

Royal Purple, API SL, SAE 10W-30.

Phosphorus 808ppm
Zinc 876ppm

For more, click on this link - HERE