I searched it out, a lot of links that the Crisco candle works.
https://guides.brit.co/guides/make-a-45-day-emergency-candle-out-of-crisco
I breezed through a few YouTubes myself. Looks like the jar approach is the safest, with a taper candle cut to fit, pushed down in the center for a wick. No one talks about any smell though.
ThankQ for the links!
And, regarding you poor neighbor, you were being charitable to tell her the simple truth and help her help him.