I've used regular unleded gas in my diesel intead of these Howes lubricants or whatnot...works like a charm.
My dad drove a semi in Europe and they used to run Siberia, Russia and some of the places which have the lowest temperature in the world, they always used mixture of gas and diesel in trying to prevent gelling and freezing over...i remember they had exaust system running through the tanks, i means thru the tanks trying to keep diesel from freezing...you tell that to any mechanic here and they'll probably call you nuts.
I guess thats why everything is so expensive here..