Zinc Additive for Flat Tappet break-in?

ramcharger said

The only versions that I'm aware of are the different weights:

10w-30

20w-50

Straight 30, 40, 50 and 60.

Please let me know where you have heard this and which weight VR1 has been affected.

Thanks

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According to the spec sheet on their web page 20w-50 and the straight weights are available as an SM oil or an SH. 10w-30 is available as an SH only.

Check the bottle before you purchase it. The SM rating came into being because of the Fed requirement to warranty cats for 100,000 miles and the manufacturers could only do that with the reduced ZDDP levels.