Hey guys I'm getting ready to break-in my new cam in my 64 Mercury with a 289. What I was wondering about is this, I've heard that there isn't the anti-wear additives in "modern" oils today and from what I've heard from two Cam companies I should use an oil additive fortified heavily with zinc and phos, during the break-in process. What I would like to know is this, is there a good oil additive that I can get off the shelf that will do the job, and what do you think about whether I need an additive at all? This additive is specifically for the break-in process and will be drained after the 1500 rpm for 30 minute cycle, and will probably never be used in the engine again. Anyway thanks in advance for any info.