Basically, it's a used vegetable oil that is mixed to form diesel. They say it ends up costing under $1 per gallon if you make it yourself. You can run it at 100% in your tank, or mix it with regular diesel at any ratio. You can get the oil from restaurants...just takes some time to put together a mixer and stuff...but I've heard a lot of people are looking into it dt the high gas prices right now.
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'03 H2
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