Are there any reasons why certain edible vegetable oils cannot be convert into biodiesels?

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answers:
Ricki say: Many are already.
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JazSinc say: The processing costs for the oil, and possible refitting of the truck fleet, may make the plan unprofitable when compared with other oils.
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Mikey, just Mikey say: It's against the law in most countries including the US.
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say: Organic chemistry. Some are too reactive or saturated or what have you. Their chemical structures and properties determine all of this.
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billrussell42 say: A lot depends on their melting point. Olive oil, for example, turns solid at about 60º so it would not work at colder temperatures.
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Jim say: Cost and availability and there is moral uncertainty about turning food into fuel when there are starving people in the world.
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