Quote Originally Posted by nivraarvin View Post
Volatility is inversely proportional to ZDDP content.

Meaning, the lesser the ZDDP content, the more likely na mag change to gas state ang motor oil and ma-coat ng motor oil ang catalytic converter.
question lang. dba kaya nga binawasan ang zddp content ng oils with api rating >SL ay para ma prolong ang service lifetime ng catcon?