Looking around the internet there seems to be confusion about how much Zddp is this oil.Does it still have sufficient additives for our motors or should I be buying the Zddp additive in cans?Also seems to be a question as to what is the correct PPM for gas motors as opposed to diesel.Apparently too much is just as bad as too little.

  

Ive never seen a subject beaten to death as this one. Apparently no one reads the other entries on this subject.



No other than Ted Eaton, YBlock engine builder deluxe, recommends any oil 10/40 or higher as perfectly safe for YBlocks. Current Rotella and 10/40, 20/50 dino oils have at least twice as much ZDDP as oils in the 60's.



Another YBlock restorer and engine builder of 55-57 TBirds says the same thing. He commissioned a study on this.

54 Victoria 312;  48 Ford Conv 302, 56 Bird 312
Forever Ford
Midland Park, NJ