The local ARCO near my work has just in the last month or so, put in a couple new pumps, one of them being a bio-diesel pump (the other is the ethanol blend). I haven't stopped for a fill up there yet, as it's about 10 cents higher than other diesel prices. I currently add in the 2 stroke oil for the extra lube, which of course increases the pump cost, probably by about nine or ten cents. Being relatively new to the diesel world, I'm unsure about whether or not to use it. I believe it's a 10% blend. Can anyone share pros and cons of using bio-diesel instead of regular diesel?