Which small fuel canister is most efficient?

Are you mailing your resupply to MTR? If so, it is illegal to mail canisters in the US Mail. They had Primus canisters for sale there in late June this year in the 110, 220 and maybe the jumbo size.

I used a Snow Peak Gigapower with an Evernew 1.3 Liter pot and an aluminum foil windbreak. We boiled around  .8 or .9 liters probably six times and had a lot left in our small (110 gram) Primus canister.

My (unsolicited) $.02 recommendation is to go no-cook as much as possible and use Esbit or Alcohol for the meals you do cook. Next time I do the JMT I will bring my Toaks 550 Esbit set (~4.2 ounces) and bring a single 14 gram Esbit Tablet for each meal I plan to cook (which won’t be many). I know the Esbit fuel is slightly heavier but it is really easy to budget on a per meal basis and my cookset is much lighter than yours and I am not carrying a metal can to contain the fuel…

Also, which Jetboil are you talking about?

A discussion of fuel mixes from Hiking Jim

Some of the smaller canisters are 110 grams of fuel and some are 100 grams.

I’m using the now discontinued jetboil Ti.

Actually, none of them is very efficient.  Hexamine and derivatives are about 13-14000BTU. Alcohols are about 11000BTU (at about a 50/50 mix of methanol/ethanol), etc…A small canister of gas will require about the same in weight of the can to hold the pressure. So 21000BTU + can will give you about 10000-11000BTU for the carried weight, or, about the same as alcohol. (Alcohol and hexamine stuff can be carried with less than 1oz per 20floz of fuel. WG or diesel is around 20000BTU and can also be carried with less than 1oz per 20floz. Of the common camp fuels, WG/diesel is the most efficient to carry.

This does not count the burner, of course… which is a different discussion entirely.

In 2014 at 7000ft elev in northern British Columbia I got exactly 9 days out of a small JB canister (with a JB Ti). Essentially I boiled 3/4+ litre  per day x 9 days. You should be totally fine with a JB canister but if you want some insurance then spring for a 110 gm MSR can.

Marginal, very marginal.

Me, I would take a new 230 g canister and enjoy my meals. If you cop bad weather, which is ALWAYS possible, you might be grateful for the extra few hot drinks.

Cheers

Hrm, I though MSR used to make a ~150 canister, but it’s not on the site anymore.

Anyone else make a medium sized canister?  (130-175 ish?)

Theory would suggest that a cylindrical canister with a diameter equal to it’s height would have the lowest surface area to volume and hence the best fuel to weight ratio. However, due to the way that canisters are manufactured, tall narrow canisters have the best fuel to weight ratio, like this one: empty weight 83g, holds 175g gas. However, this won’t be of any help for a Jetboil, sorry!

I think you may be confusing jetboil STOVE efficiency with CANNISTER efficiency in reading the various JB
feedback.

With regards to getting 10 boils from a 100g cannister, you should be fine. Even boiling 3 cups at a pop, I doubt you will use more than 8 grams per boil in your Ti Sol.

Do the math..you will be fine.

First off, brand makes no difference. 100g of gas will be 100g of gas, and th various mixtures, while meanigful for colder weather, probably will not matter on a summer JMT trip. What will matter is that some cans are 110g and some are 100g. That extra 10g of gas not only gives you just a hair more margin but gives you just a slight advantage in the ratio of fuel to canister weight. But even that is basically meaningless, like wring the sweat out of your bandanna for a bigger weight savings.

Now as to whether that 110g is enough for that stretch: for me, that’s awful close. Cooking for two, I find I get 10 days out of the 220g canisters. Not with a Jetboil, just a regular top mount stove. So you should be more efficient, But then cooking for one tends to less efficient, So that’s why I’d say it’s awful close. Now if your experience has shown that that rate of fuel consumption will leave you with some margin for error (like a spill that means you have to boil  again, or weather that keeps you in the tent and wanting a few more hot drinks), then you’re good to go. But if you have to base your plan on other people’s experience, then I’d err on the safe side and carry the big canister.