This is quite ridiculous and nothing more than a publicity stunt. Frying oil, especially USED, is extremely hard to get. And not available in large amounts. So why bother? It will cost more than just pumpin' regular gas.

Using biokerosine is great as long as it is in fact available in large amounts, with prices lower than regular kerosine. Neither is the case now, and therefore this will never be commercially used in the long term..