I use a 2 oz coleman exponent. While on my last trip I took 2 full canisters and never finished the first. Mind you this was for 2 people with one stove and basically boiling water only. simmering takes more. I made a cozy for my only pot out of a wally world sleeping pad , foil, and spray adhesive. C A Cozy will save alot of fuel. Sarbor, and a few others here are the real experts though.