http://www.mobiloil.com/USA-English/MotorOil/Files/Mobil_1_Product_Guide.pdf ZDDP claimed amounts for Mobil 1 http://www.zddplus.com/TechBrief2%20-%20ZDDP%20and%20Cam%20Wear%20-%20Just%20Another%20Engine%20Oil%20Myth.pdf Interesting info on oil and ZDDP Joel McGregor