[AT] Related Engine Oil Question

[Stephen Offiler]

Short answer is no.  These "high mileage" oils are still rated to the most
modern API standard, which is SN.  The ZDDP disappeared after SF or SG or
thereabouts.

If you are looking for ZDDP, you will find that the oils marketed as
"Motorcycle Oil" are rated SF/SG and will typically contain some ZDDP.

SO


On Wed, May 29, 2019 at 4:36 PM STEVE ALLEN <steveallen855 at centurytel.net>
wrote:

> The topic of Zinc in modern gasoline-rated engine oils has surfaced in the
> recent discussion of tractor oil.
>
> Does anyone know if the "high mileage" formulations currently on the
> shelves contain the Zinc additives desirable for non-roller cam engines?
> Since these oils are sold for use in older engines, I wonder if they are
> already fortified in that way.
>
> The "original" Steve Allen
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