[Shop-talk] Burning cooking oil in your furnace?

[Mark Miller]

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I know lots of people burn used cooking oil in diesel vehicles.

And since my oil heat is basically diesel fuel, my question is...

Can I burn used cooking oil in my home heating oil tank?  If so, what do I
need to do with first?
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Look at greasecar.com for way more info but the short answer I would give
is: not worth the effort.

Folks who burn used oil in their cars typically have a second tank for the
oil, as the car has to be run on standard diesel to get up to temperature so
the veggie oil can be pre-heated.  It also needs to be dewatered and
filtered very well before it is used in the car.  You're not just pulling up
to a restaurant and filling the tank.