The Milwaukee Biodiesel Co-op has B100 for sale at cost to its members. Here's the details:
Location
We are located at 2352 S. Kinnickinnic Ave.,
Milwaukee, Wisc., at Future Green. If you have trouble finding the
store, call (414) 294-4300, and the friendly staff will guide you there.
Hours
The Co-op sells ASTM-certified B100 (100% biodiesel) on:
Saturdays 12:00 PM - 3:00 PM
Tuesdays 5:00 PM - 7:00 PM
Hours will be expanded as allowed by volunteer availability.
Pricing
Member Price: $3.20/gal
Non-member Price: $3.68/gal.
Co-op Membership is $125 for one year or $75 for six months.
What to Bring
The
Co-op cannot and will not fill any container other than a spill-proof diesel fuel canister. One such canister ("tote") is
shown below:

State
law dictates that we cannot fill any container other than approved
diesel containers. Such canisters are available at are hardware and
home improvement stores. We will not fill red containers labeled
"GASOLINE."
At this time, you can't drive up to a pump and fill your car from it. But, we will carry the tote(s) back to your car for you.