From Rislone website
A "snake oil" response?
Can I use Rislone Hy-per Lube ZDDP Supplement in my newer vehicle?
No, you should not use Engine Oil Supplement with Zinc Treatment in 2005 and newer gasoline and 2007 and later diesel engines. Current oils have enough Zinc to protect moving parts inside newer engines. However, to help prevent sludge and keep that engine clean, it is recommended to use Rislone Engine Treatment p/n 100QR or 4102 on all newer engines.
How is Rislone Hy-per Lube ZDDP Supplement different than break in additives (Cam Makers wear in additives from above post)?
Break in additives contain extremely high concentrations of ZDDP and are only designed to be left in the engine for a short period of time. Many of these additives don’t contain detergents or other lubricity additives important to keeping your engine clean and lubricated for thousands of miles. Rislone Engine Oil Supplement with Zinc Treatment not only contains the correct amount of ZDDP, but also the other additives important to protecting your engine. Do not use as a break in additive.
TYPICAL TEST RESULTS INDICATE:GASOLINE ENGINES
With typical SN rated oil at a 7% dosage rate expect levels to be raised to a total of:
Zn Zinc 1700 - 1800 ppm
P Phosphorous 1500 - 1600 ppmRislone Zinc