318 driver - cam change or not?

Just FYI
My first Hughes cam was their 223@.050 that was advertised at 270/276/110; .008 tappet rise. They said it was a fast rate...... but at 47*/2 @ from advertised to .050, I don't know what's fast about that part. In any case, I sprung that cam with enough pressure to run 7000/7200 . It lasted over 40,000 miles and only puked because I changed oil one day with a brand that had the ZDDP reduced. It only ran for a few hours after that.
The next cam is a Hughes again, the next size bigger, and I put more spring on it. This time a 230@.050 advertised at 276/286/110. so 46*/2 this time. That cam now has over 60,000miles on it, and has been in there since fall of 2004.
The point is, too long.
I have been waiting several years for it to puke so I can change to a solid.
Ima thinking longevity of the cam is not gonna be an issue
PS; I use whatever oil is on sale, just adding a can of GM's version of ZDDP......Why GM?; just cuz I drive past the dealer once a week.