Buy diesel at Indian casinos
I'm finishing up an 11 week trip, and have found the best prices by far for diesel are at Indian casinos. I topped off my tank at Feather Falls casino in Oroville Ca for $3.39 today, and at the casino in Ukiah yesterday for $3.39 yesterday. Both were #2 diesel and at RV/truck islands. Most other stations in the area are around or over $4 a gallon and pumping B20 biodiesel. I had similar good fortune in Oregon and Washington.