Re: ZDDP... another oil thread
With the reduction in ZDDP, oil formulators are turning to different additives for anti-wear. Titanium is one example and there is also calcium, which is multi-functional (detergent and anti-wear).
Also, xW-40's don't have the same ZDDP restrictions as GF5 5W-30's. They also have a higher High Temp High Shear and are more ideal in severe conditions.