100% Synthetic Double Ester. Designed for highly modified engines. Electrochemical bonding to metal parts. Up to 5x higher film strength. 0% shear loss on Bosch ASTM D6278 test. WARNING: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www. P65Warnings. ca. gov.