Several weeks between refills.
Patrick:I doubt if we use a gallon of alcohol a year (and we use the boat year round, much less in the winter). We boil water for coffee every morning (2 x each weekend). We cook assorted things on the stove top and in the oven.There is really not that much difference in cost between Home Depot fuel and West Marine fuel as for cost. I really notice very little difference in either as far as how clean it burns.We also do a lot of cooking on the BBQ so it is difficult to compare how you may cook to the way we may cook. But at $10/gal, it is an inexpensive cooking fuel. If I lived on board, I would probably consider a propane setup. If it is weekend use, it is hard to beat and you don't need to worry about sniffers for your bilge, failed regulators etc etc.