Just thought I would just bring this topic a little bit back on topic.
(before you boozy lot get drunk with envy of Eric/roseways' 2 gal of Gin).
http://news.bbc.co.uk/1/hi/uk/7565299.stmActually I found it quite an interesting read, especially when you realise that the cooking oil or fat is not being modified in any way at all, apart from a heater to keep it liquid.
And as for filtering it, one guy doesn't even filter it.
I used to hate being stuck behind a car/van using LPG fuel because the smell was always terrible.
So what would it really be like behind a Fat Burner?