I just have to wonder even with the "junk" metal if the oil problem is true and it was fixed if it would be and issue still. Because with proper lubrication and roller lifters there cant be that much friction on the cam even if it is made from junk China metal! Just a thought.
I have zero experience with the G3 hemi so all I have to go on is what I've read here about the problem they have but good lubrication is key to making even junk live long