I was looking at getting my 1967 Camaro out of hibernation in another month or so. The car hasn't been driven much in the past 20 years due to changing priorities in life. With that being said I was looking at several different "high zddp" oils including: Lucas, Schaeffer, Brad Penn and Valvoline (not interested in RP & Amsoil, nor additives). My question isn't so much what brand, but rather how much zddp is too much. From what I can gather, when going over 2000ppm, issues can arise with bearing and corrosiveness; but both Lucas Hot Rod and Schaeffer # 709 have numbers pushing or above 2000ppm, whereas BP and Valvoline are 1100-1500. If above 2000ppm is bad, or at least pushing the envelope of bad, why do they offer it? Do their other additive packages combat the corrosiveness? I was planning on using BP, but then got thinking and started reading the 'net and it seemed that the Schaeffer might be a better oil. I am going to be buying Schaeffer's #158 compressor oil, so one thought to to tack their #709 onto the order, but I am nervous about using an oil that could eat my bearings....LOL Any insight to having zddp over 2000ppm right out of teh bottle and if it would/will do harm?