Inliners International Forums General Discussion Engines Oil for a Chevy 250?

I have been using the Brad Penn (now PennGrade1)for the last couple of years. Used their break in oil for the 261 motor with the 302 GMC rods and the Schneider flat tappet cam. Broke in perfectly, runs great, good zinc and additive package, and the oil clings to the rocker arms over the winter.