I have a one quart oil container, I fill it 3/4 of the way up with diesel, either off road or on road. Put a pinch of the yellow sulphur powder in. Close and shake for a minute. Let it sit on The shelf until the next time you fill your diesel jugs. It doesn't all dissolve, so don't shake it again when you add it to your diesel. I use the 5 gallon yellow plastic ones. Add an ounce to the 5 gallons. Agitate for a few seconds. Remember, we are aiming for around the 500 parts per million, it doesn't. Take much. I have had diesel in jugs for a few years, and I get a little condensation in the bottom of the jugs, but no growth. No biocide needed. As Ed says, it may not play nice with the dpf or the new stuff that regens, but works great on my old 70hp Deutz from 1985.