James Sweet wrote:

Will ordinary 10w30 motor oil work ok as transformer oil? This is for some
HV experimenting, not any sort of commercial or permanently installed
product. It's thermally stable and not particularly flammable, but I don't
know how the various additives affect the insulating properties. Is there a
better choice that I can pick up locally for a reasonable price?


Don't you have a oil wholesaler or transformer shop in your area?
Sometimes a call to your electric company can get you a quart or two
from the bottom of a 55 gallon drum for free. They have to top off and
change the oil in large transformers from time to time and buy it in
bulk. The last time I needed some, I got it from the R&D lab at a local
Steel mill, in Ohio.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida