85% of my usage is purchase at Holiday Fuel Stations. When I travel Out west I top My auxiliary Tank off at only the same Stations, Lusk WY, Jackson WY,Evanston WY,Bozeman MT,Big Timber MT, Swan Valley ID,Limon CO, Steamboat Springs CO,Heber City UT, I check the Pots, Riser, pumps,drop area. If I don't like the look of things I move On,One of the benefits of Auxiliary Tank(s). I worked at gas supply for Six Years Causal Yard and Delivery (Transport) I have two close friends, 1 Worked for Holiday transport for years (Now work for Excel) the Other My Neighbor works for Flinthills Refinery as a chemist and travels North America for Flinthills.