Just what I was hoping to find on this forum.
I changed my oil for the first time (4 quarts drained out, was showing somewhat less than the half point on the dip stick), so I started with 3.5 quarts replacement since that's what's supposed to be in these engines. Plus put in a new big oil filter Napa 1068.
No oil on dipstick, added more oil to 4 quarts, just barely touching the tip of the stick.
Said to myself...wtf? Added a 5th quart and now just maybe 3/4 of the way up to the max fill line on the stick.
I must have the upgraded oil pan. Noticed the drain plug, where it screws in, had a really beefy welded on metal through which the the threads were tapped. Didn't look factory to me but I figured maybe it had been repaired at some point. Now I'm thinking differently.