From someone in the oil and oil additive business I can say that this article is actually pretty accurate compared to most of the crap out there. However, ZDDP

From someone in the oil and oil additive business I can say that this article is actually pretty accurate compared to most of the crap out there. However, ZDDP is an anti-wear additive not an extreme pressure additive. In the article it says, "camshafts exert pressures in excess of 200,000lb per square inch" which means you need an extreme pressure agent. While ZDDP is effective, it does cause catalytic converter problems in vehicles made after 2006 (since they switched the metal in them), so don't run out and put this in your new cars. Mark, www.sfrcorp.com