Engine break in oil?

SGBARRACUDA said
Everyone has there opinion and the way that works for them. I run 10-30 Lucas Hot Rod most of the year. In the summer here in Fl. I run 10-40 Lucas Hot Rod.

That lucus hot rod must be good stuff!! I see alot of yall use it!!
Does the 10w30 and 10w40 change your oil pressure any?