Thread: ZDDP question
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Old October 18th, 2007, 11:26 PM
A2000RICH A2000RICH is offline
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If it was my car and the engine was near stock, ie flat tappet cam/lifters i would absolutely use it unless i was using one of the "exotic oils" that is guaranteed to have adequate levels of ZDDP. Unfortunately most of these manufacturers of what i call "exotic" oils are somewhat lacking on hard data and generous on "promises" and rely on baseless testimonials. Last week i had Mobil one SM 10-30 and Valvoline "dino" SM 10-30 checked and each one has ZERO phosphorus!--------both of these oils have shown a drastic reduction since only three months ago-------each of them did have .07% Zinc but that does little good for wear protection------pure Zinc only serves as an anti corrosion inhibitor--------remember the ZDDP molecule is defined by a composition of Zinc, Sulfur, and Phosphorus that is combined in a special process---------- you cannot have ZDDP without al three---------it is really an interesting situation and it is clear that the industry in general doesn't give a hoot about older cars---------the much touted Rotella 15-40 CJ-4 is also way down on ZDDP contrary to what everyone seems to think--------the highest i have been able to find in the last 60 days is Castrol "Tection" at .05%---------i would never trust an oil with .05% to protect any of my valuable TR's
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