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Good point, I use waste stale gas from small engine repair shops, or waste paint thinner from body shops, when I can get it; otherwise I buy gasoline to blend with my waste oils. However, I thought you were speaking of how much you should have to pay for waste oils, not for the final product.

I have never had to pay for recycling waste oils and solvents. In fact I get more waste oils of all kinds than I can use. However, if i ever get to the point that I cannot meet my fuel needs, then I would consider 25% of pump price per gallon for diesel fuel acceptable. But, long before that I...

Correct The reaction between WMO and biodiesel has nothing to do with how good your biodiesel is. It has more to do with how bad the WMO is; because heavily burned and overused WMO has lacquers in it, which are high melting point polymerized hydrocarbons, which are not as soluble in vegetable...

It is possible that the biodiesel will react negatively with the WMO, so if you are going to thin the WMO with biodiesel, then you will wont to leave the blend to settle for about a week before filtering it, to allow any incompatible components to precipitate out of solution and settle to the...