what type of oil to use in a 225?

My personal choice!

Quaker State "DEFY" 10W/30 it has the ZDDP additive
And I only use the Mopar filters.

Mopar always has all of their parts supplied by the lowest bid contractor. That doesn't sound like a recipe for a quality filter to me.

Nice to know more people are using zddp snake oil. This this day there are still flat tappet cam equipped cars in production they do not require zddp either. here is GM's official opinion on zddp.

http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1049812

Use a name brand quality oil and remember that heavier weights of oil put more force on the oil pump drive gears which have been known to shear off on some slant sixes.