318/390 stroker kit oil leaks NEED HELP!

I'm thought synthetic oil was not recommended for break in. Rings don't seat properly.
Reseal intake add a breather or 2.
Maybe I shouldn’t have used the royal purple. I was told it is the best. After we changed the rear main seal I had to drain the oil so I changed the filter abs put the royal purple break in oil and am currently running that.