BOISE -- Eleven Stinker gas stations in southwestern Idaho will begin pumping biodiesel next week.

The stations upgraded their pumps and equipment to carry the environmentally friendly gas blend after receiving an $124,000 grant from the U.S. Department of Energy and the Idaho Department of Water Resources.

The stations will offer a blend of 10 percent biofuel and 90 percent petroleum diesel at first.

But they plan to get ready for a 20 percent blend of biofuel soon.

State and company officials will mark the change next Monday at a downtown station on Main Street in Boise.