If you want your engine to last, adding proper fuel additives will make more of a difference than what oil you use. I mentioned this before and I’ll say it again, how often you change your oil matters more than what goes in.
All I do is work on old mechanical diesels, some that were outside of their oil spec before the 6.9 idi was ever produced. I own an antique jd450 with 33,000 hours on it, I run the new delo oil in it, and it will continue to run for many many hours on this oil, until it too becomes outside spec. This engine hasn’t had the oil it was designed for in probably 60 years, but yet it has never been apart....
All I do is work on old mechanical diesels, some that were outside of their oil spec before the 6.9 idi was ever produced. I own an antique jd450 with 33,000 hours on it, I run the new delo oil in it, and it will continue to run for many many hours on this oil, until it too becomes outside spec. This engine hasn’t had the oil it was designed for in probably 60 years, but yet it has never been apart....