I was buying it bulk for a while a couple of years back. One of the operators reckoned it was just like kitchen detergent. It did certainly lather well and rinse off in water quite OK.
however I got to do the sums on the back an envelope and by comparing the thermal efficiency of the distillate and green stuff against the blend, I think I remember as 80 / 20, and the whizz bang discounted price, I reckoned that I was being ripped of by 4 cents / litre.
tricks in every trade, yup, I reckon I was greenwashed for sure
Not only that I think I read somewhere that it takes 1.25 litres of diesel to make one litre of green stuff, which is only 80% the thermal efficiency of diesel. which makes a whole of duff to me.
cheers tet