I use oil. I have two 275 gallon tanks that I fill as late in the year as possible. I live up a large hill, and the oil truck can't make it up in the snow/ice. This summer, I bought a pellet stove as oil prices are out of control. I put $1100 in my tanks last month. Filled one tank, and just a little of the second. Yuck! Gas prices have gone down, but not oil. Gonna be a lot of cold people this winter.