It would be nice if the failures provided add'l info. There are so many possibilities that may/may not aggravate a borderline engineering issue.

How often between changes?
What oil used?
Ever use Slick50 or other additives?
What climate?
Average length of trip?
Ever use engine cleaners between oil changes?
Ever use ZDDP enriched oils? (if so, how consisently)?
How hard driven?
How well serviced? (air filter changed the "right" amout -- more often if dusty)
Was oil ever underfilled by oil change service company? (I found one that showed 4.2 qts as the correct fill!)
Ever use top-end cleaner (like SeaFoam)?

There are so many variables!