The deal with roller cams is the parts have to be extremely hard, because when you get the cam follower on the pointy end of the cam there is an extremely small contact area. I also have a feeling that there is a lot of metallurgy taking place with the inverted bucket technology. There needs to be a certain amount of phosphorous (the part of ZDDP that is what we are really after) But after reading several thousand pages of reports, I still have no more of an idea of what is real or not. I do know it probably won't hurt anything to have a certain amount of ZDDP in your oil. Too much is just as bad as not enough according to several of the reports. However the major need for elevated ZDDP levels is mainly during cam breakin, GM uses an assembly lube which IS the supplement. You may or may not need it, but given the amount of money I put into my engine, I will just go ahead and spend the extra $20. Yeah I may be lining the pockets of some scammer, but, I have wasted a WHOLE LOT MORE money on stupider things. And I give the government way more money than that, and I am a whole lot less satisfied with their performance than I am with my engine.
