Quote:
Originally Posted by dagnabbitt
It is in this article that I learned that yes, you can have too much zinc. That is why I try to stay away from additives. IMO whatever oil you choose to run should have everything in it that the manufacture requires.
|
You do understand all regular oil made now does not contain the ZDDP (zinc) oil did when our 70's motors were new, right?
When Catalytic converters were mandated oil companies had to re=formulate their blend considerably reducing zinc levels.
Flat tappet hydraulic and solid lifter cam motors like our original, and some rebuilds, have flat tappet cam motors and still require oil as it was pre CAT oil blend. This is why a zinc additive or oils like Valvoline and Castrol "racing oil" are made and should be used. Those higher zinc blend oils (like oil used to be) say right on bottle not recommended to cars with catalytic converters (it kills CATS)
https://www.amazon.com/gp/product/B0...e?ie=UTF8&th=1
I buy Valvoline VR1 10-30 on Amazon as whatever auto part stores just carry the 20-50 weight.