Zinc & Phosphorus -- Brad Penn Oil

[Bob In Ct]

Hey Patrick:
How much ZDDP is enough? Is it possible to have too much? Is the penalty of high viscosity worth the extra ZDDP? Why not add the EOS to a full synthetic rather than paraffin based oil?

A while back I watched my neighbor destroy his brand new John Deere mower by purposely adding extra oil to the crankcase. If 1 quart is good, two must be better.

Just my $0.02.Bob

[patrickt]

Originally Posted by Bob In Ct

Hey Patrick:
How much ZDDP is enough? Is it possible to have too much? Is the penalty of high viscosity worth the extra ZDDP? Why not add the EOS to a full synthetic rather than paraffin based oil?

A while back I watched my neighbor destroy his brand new John Deere mower by purposely adding extra oil to the crankcase. If 1 quart is good, two must be better.

Just my $0.02.Bob

The literature suggests that 1200ppm zinc is sufficient for solid flat tappet cams and the benefits begin dropping off at around 1900ppm. If you don't have a solid flat tappet cam then any of the good oils will work just fine.

[jwd]

Originally Posted by patrickt

The literature suggests that 1200ppm zinc is sufficient for solid flat tappet cams and the benefits begin dropping off at around 1900ppm. If you don't have a solid flat tappet cam then any of the good oils will work just fine.

Even before the restrictions, no oil ever had more than 1400 PPM. Levels at and above 1600PPM have been associated with corrosion issues. There is no reason to run any exotic combination of anything. Just use a CI-4 or CJ-4 rated oil (still has 1200PPM).There is soooo much B.S. out there. This subject has been beaten to death.

Jim