Precisely my point. Thru friends in the restaurant supply biz I can get any quantity of used fryer oil.

And it would be very simple to adapt a system of my own with a fuel changeover valve{from a junked Jag}and if the oil needs preheating why not bypass engine coolant into a heat exchanger/plenum arrangement and then switch over at the right temp?

I'll check the website mentioned. Any other "points"in the right direction?

This is most likely old hat to many of you so pardon my exuberant ignorance and help point me in the right direction.

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