I was browsing the ExxonMobil website and came across their guide for Phosphorus and Zinc levels in the Mobil 1 family of oils. It came to my attention that their GM Dexos 1 Gen 2 licensed 0W-20 oils all contain a reduced level of Phosphorus and Zinc compared to their 5W-20 oils, or even the HM versions of 0W-20. Does anyone have any idea why?
P- 650 ppm, Zn-750 ppm
1) M1 AFE 0W-20
2) M1 EP 0W-20
3) M1 T&SUV 0W-20
P- 800 ppm, ZN- 900 ppm
1) M1 HM 0W-20
2) M1 EP HM 0W-20
3) M1 EP 5W-20
4) M1 EP HM 5W-20
5) M1 5W-20
6) M1 HM 5W-20
7) M1 T&SUV 5W-20
P- 650 ppm, Zn-750 ppm
1) M1 AFE 0W-20
2) M1 EP 0W-20
3) M1 T&SUV 0W-20
P- 800 ppm, ZN- 900 ppm
1) M1 HM 0W-20
2) M1 EP HM 0W-20
3) M1 EP 5W-20
4) M1 EP HM 5W-20
5) M1 5W-20
6) M1 HM 5W-20
7) M1 T&SUV 5W-20