Ahh... the famous fuel discussion. Funny how it always reappears and the same assumptions are made again and again and some will advocate a nuanced viewing point. Again and again
In Reverse wrote:Just weighed one of my small canisters and it's 141g. Probably just over half the gas left in it.150ml of meths is 119g if my maths is right, plus the weight of the bottle.Difference is negligible n'est ce pas?
Not just that, you also get about 9 - 10L of boiling water out of 100g gas.
Try doing that with meths...
As soon as your trip is of certain length (length depends much on how much fuel you use per day) gas will be lighter than meths, no matter how much lighter the meths stove and fuel bottles are. Take this further, speak, even longer self sufficient trips and petrol will win over gas.
Do this in winter (snow/ice melting only) and petrol wins even on short trips.
Primus cartridges weights are following:
100g fill is empty 90g
230g fill, emtpy 150g
450g fill, empty 217g
An example for a solo ten day trip with little stoving:
My meths container is a used capri sun bottle, a mere 12g for up to 330mL of meths (260g as density is low) which lasts me just about 10 days; 0.5L warm-hot water (no boil) in the morning for warm cereal and a cup of tea and 0.7-0.8L in the evening, just about to the boil for noodles, mash or freeze dried food and a cuppa. I use a measuring cup, so I don't use too much fuel, as I can't extinguish the stove and pour the meths back.
6g stove, 10g windshield, 12g fuel bottle, 4 g measuring cup, 260g fuel = 292g
Gas for the same trip will be 100g cartridge with a total of 190g.
45g stove, 10g windshield (not the same one as for the meths), 190g fuel bottle and fuel = 245g
Meths is just about 50g heavier than gas.
Other example, 5 day trip with partner, cold weather (more warm drinks, more fuel consumption as water < 10°C).
2L hot water in the morning, 3L hot water in the evening. Cold water during the day.
Meths ends up at about 875g fuel for only 5 days. Makes a total of 925g.
Gas is at about 330g. Makes 100g + 230g cartridge, weighing in at 570g. Makes a total of 625g.
All in all a meths system will be 300g heavier.
Yes, 300g. That’s a breakfast and supper from pouches each containing 700-800kcal.
Or my full rain gear.
Or my 30 L rucksack.
Or my handlebar and stem.
Same goes with petrol. Once you need to melt snow, petrol quickly wins the overall weight game.
Of course, for weekends or multiday bikepacking trips outside the cold season and where I can refuel/restock every couple of days I go with meths too, but before bigger trips I always question what fuel to take.
If, for example I ride across Iceland, I get meths (stupidly expensive in Iceland) in Reykjavik, make packages I then send ahead of me to local post offices which I then visit to pick up meths and goodies in places where there's not much of such.
Now I'm going again on a very similar trip with my girlfriend (more hot water, less ground covered per day), I'm quite sure, we'll bring the gas stove as it's the less bulky and lower option.
I'm not saying that meths is rubbish, au contrary, it has it's place and is likely the best option for most users here and I likely do about 40 % of my stoving nights out with meths and 30/30 gas/petrol.