Joe Gibbs break in oil

There seems to be lots of talk about this in previous threads. I think what everyone is in agreement with is that our older engines benefit from the added zinc and phosphorus that seems to be lacking in most of the off the shelf oils. 1200ppm of zinc seems to be the magic minimum number. I took my car back to the engine builder for the first oil change and inspection after seating the rings and they suggested I use 5 quarts of Comp Cam break-in oil for this one and then a good quality 10w-30 oil with a zinc additive such as Lucas brand thereafter. In any case it's the zinc and phosphorus additives that you need to be concerned with whether they come from an oil or an oil additive. IMO it's just good peace of mind.

Bill