On Wed, 25 Jul 2018 07:16:38 -0400, John H.
wrote:

Dunno what's in biodeisel?

Biodiesel can be produced from straight vegetable oil, animal oil/fats, tallow and waste cooking
oil. The process used to convert these oils to Biodiesel is called transesterification.

'Transesterification' sounds like something that could leave you very sterile if not careful. But
I've heard of folks making biodiesel in their garage with old McDonalds french fry grease.

The electrician who worked at the country club burned cooking oil in
his truck. The process was not that complicated, mostly just filtering
and some alcohol as I recall but I never saw the thing done. I think
he had a heater in the truck too.