High-zinc oil or ZDDP oil additives?

Yellow Rose, I respect your knowledge and input on subjects. But this is my example, I have seen Fram oil filters be blasted on this site. Yet I know people that have bought cars and driven them to almost 300,000 miles on Fram filters without issue. How do you tell that guy he isn't protecting his engine properly by using a Fram????? And he continues to buy Fram oil filters and continues to stack miles and miles and somebody is going to continue to say what he is doing doesn't work???????
Back to this thread, I've been running flat tappet cams for years and years, and broke in several new flat tappet cams over them years, and I have YET to ever have a lobe go flat. I will never pay your 22.00 bucks for a quart of oil. Not unless somebody will give me a written guarantee that I will gain at least 2 mpg or drop 3 tenths in the quarter. Now, I'll sit back and listen to why I should change or why what I'm doing doesn't work...... (sigh)