[Slashdot Brew Your Own Auto Fuel For 41 Cents A Gallon]1. only thing about this bio diesel is that your taxed for it still. Of the 99.9c per liter that people in ireland are paying for petrol something like 50c of that is going on tax. with diesel, its not as much tax, but you would still have to pay it due to road tax laws. Still, paying half the amount for feul would be still cool.