Petrol in Colchane, Chile
 

I am hoping to make it from Iquique, Chile to Oruro, Bolivia in one day. My map doesn't show a gas station east of Iquique on Hwy 15. Does anybody know? How about fuel on the Bolivian side?

there is a gas station on the Bolivian side of the border, but with foreign licence plates you pay a different price. I don't think you will be concerned about that... On the Chilean side there is none. First place is Iquique.