[6pack] ZDDP again

[Shawn J. Loseke]

Like Bob says, I would go by the SM rating. It might still have some but at a 
lower concentration. Not high enough for proper camshaft protection over your 
regular interval. Reading some of the tech specs on ZDDP, it appears that it 
is a sacrificial additive that depletes as its called into use. Lowering the 
concentration lessens the interval between needed oil changes. As you might 
expect, increasing the concentration increases the interval. Haven't seen a 
correlation to percentage and mileage yet though.

Shawn J. Loseke
Fort Collins, CO
http://www.triumphowners.com/79   (1972 TR6)
http://www.triumphowners.com/690  (1978 TR8)