Fuel use 7 days with MSR WindBurner Duo Stove System 1.8 L

WindBurners are pretty solid in all environments. 8 oz should be more than enough.  My 2 cents

For a solo trip in the Sierra or about 7 days, I use half of a small canister with a less efficient stove. But I do probably boil less than you indicate… no hot cleanup water, no hot breakfast other than one hot drink… and I don’t heat to a rolling boil.. shut it off at a simmer. So I think you will be good with your plan

I recently did a 5 night trip with 6 other people. We had freeze dried meals every night plus one lunch of freeze dried.  42 total. Breakfast was oat meal plus 3 16oz boils for coffee.  We had a total of three 8 oz canisters. Overkill.  I do not think we went through 2 canisters.

When I go on a trip with my wife, we get about 10 person-meals out of a 4 oz canister using an old pocket rocket. She likes to boil a little extra for clean-up also. It sounds like you are doing 6 dinners and 2 breakfasts and 4 mornings with hot drinks (estimate as half a meal), or about 20 person-meals. I will say that an 8 oz canister would be just about enough for us in that scenario. Worst case, you don’t get a hot drink on the last morning, or you build a twig fire between a couple of big rocks and set your pot on the rocks. Good practice.

if you have just barely enough fuel and don’t want to bring an extra canister because of the weight, there are things you can do to minimize fuel usage.  As discussed on many previous threads.

if you turn the stove way down it’s more efficient.  it will require less butane to boil a pint of water.

don’t heat extra water.  Measure out just what you need.  Heating more water than you need will require extra butane

don’t heat the water to a full boil.  You only need it to reach 165 F to kill any bugs.  Heating it more than that will require more butane.  Although, to rehydrate food it helps to have water close to 212 F.

Although, to rehydrate food it helps to have water close to 212 F.

So true. Water won’t get hotter than about 190 F where I’m usually camping, and it takes at least twice as long to hydrate food.

If you follow Jerry Adam’s recommendation you should have enough fuel.

The wife and I did the island last year in September for 8 days,  and used ONE 4 oz canister  ( little gas was left) following Jerry Adam’s recommendation …. I had another 4 oz canister as a back up that we never used (margin).

Following was my cook kit set up:

I have the regular Windburner and used a 4 ounce fuel canister in the Bob for 8 days, cooking all breakfasts and dinners. I did not use up all the fuel.

I would guess an 8 ounce fuel canister would last for you two. In the event that it doesn’t, you can save your most cold-soakable food for last, just in case, like ramen or couscous. That’s kind of what I did, not wanting to carry extra “just in case.” I also figure that last day or so who cares; you’re about to leave trail and go get pizza and beer.

Thanks everyone for the feedback. It sound like our estimate is realistic.

Sense our trip is to Isles Royale. Water should boil at about 210 F. The average elevation is around 1000 ft.

Using fire for a stove backup is not possible. Fires are only allowed at few designated places on the island.

We do not want to cut our supplies too close. Weather can delay the ferry home from one to three days.

Actual fuel use came out to 96g for 8 days.

So 3.5oz for two people for an 8 day trip?

Good!  Your calculations seemed to be pretty spot on.  Gotta love the WindBurner efficiency.

Yes 3.5 oz. And our trip turned into 8 days rather than 7. The WindBurner is good!