Would you please care to elaborate on your experiences with oilers?
Sonicboom -
There is nothing to elaborate as Odyssey doesn't use "oilers" (older oil filled caps/cans) in the power supply on amplifiers. We do use however small value (<10uF) hybrid capacitors (oil/paper/film, etc.) in different circuits - mainly small filtering/bypass applications, with very good results. This apply to all the brands you mentioned and others we currently use of course.
The critical point affecting mainly axial capacitors is the proper handling specific to the leads! It is very easy and "naked" to the eye to crack the entry point of the lead resulting the premature drying of the capacitor. It is my experience that older oil/film/paper (I mean old!) capacitors use to dry faster, as their construction (sealing) was not as good as current production techniques.
When restoring some older units (Scott, Dyna, Heath, etc.), I would change the caps before even powering the unit.
Current aluminum electrolytic capacitors (large values) used in power supplies in well designed circuits (Odyssey of course) these days are very reliable in my opinion.
Thank you.
Alex