Originally Posted By: parshisa
Ok, if that was the case and Ca is really a killer and promotes LSPI so badly, how does this Amsoil oil still exists (they are not the only ones with high Ca but let’s use them as an example)?? All the engines with their SS would be in a junk yard by now. My buddy has a shop for GTR’s and all he uses for them is AMSOIL SS, no issues whatsoever. And those cars are boosted as fawk. 0 engine failures. There are certain conditions have to be met for the LSPI occur - high boost low speed. Why in the [censored] would someone floor it in the 6th gear? Common sense it is, common sense.
Those aren't direct injected, though, if I recall correctly. And, of course, even among forced induction direct injection engines, things are always application dependent.