Got a call from the city today looking for type 3G dielectric oil. I have transformer oil here. I've been searching and have a few calls in. The use is for lift station submersible pump. Motor space is filled with oil. Much like a ac compressor I guess. Maybe #12 knows about this. There doesn't seem to be much difference between the oils. Just labeling. All mineral oil. Will I be safe using oil labeled only as "transformer oil" in a sump pump?