Zinc and Phosphorus amongst diff viscosities

[cmayna]

Per a given brand of automotive oil such as Mobil 1, Redline, etc, will the % of Zinc and Phosphorus change say from a 10w30 to a 20w50? If so is there an estimated percentage increase or decrease depending on which way you go?

Or another way to ask it is, if one was to have a variety of different oils tested, is it important to match the exact weight of oils or will the ppm of the Zinc and Phosphorus remain about the same?

Thanks

 

[MolaKule]

The API rating, not the viscosity, will determine the amount of ZDDP.

 

[cmayna]

Sorry, my error in terminology.

 

[TallPaul]

Seems they could load up more zddp in the 10w40 and 20w50 but not sure many oil companies do. Valvoline product data sheets show the same zinc and phosphorus across all viscosity grades. Even Maxlife does not have boosted zddp (but VR-1 does).

 

[FrankN4]

Mobil 1 5/10W-30 have 8oo ZDDP. Mobil 1 15W-50 has 1200 ZDDP.