High levels of ZDDP is fine for many, many miles. We have cars that have been running high ZDDP oils for over 160K and the cats are just fine. In fact, we only use high ZDDP oils in the shop. The entire concept of ZDDP killing the cats is way, way over stated.
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“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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