Opinions about longevity of oil-filled caps

[Ralph S]

So far the ones I've replaced are polarized, but after pulling the originals from service, I've found them to be right on value and I probably didn't need to replace them after all. They are in metal cans and completely sealed! You're right though, the values of these are in the non-electrolytic range, i.e., .25 @ 650vdc and a double such as 2 x .5 mfd at 600 vdc with a common ground. I suspect there are others which are much higher values, I just haven't gotten to them yet.

Thanks for the comments; keep them coming!