I am reminded once again: “In theory, theory and practice are the same. In practice, they are not.” 🙂
I did some testing of methanol vs. the 2:1 mixture I found to be non-sooting.
I tested .5oz of both fuels in the Altoids burner, civilian Trangia, and military Svea/Trangia. Across all the cases there was only a 1-2% variation, and it was not associated with any stove/fuel. This small variation could be a function of my ability to accurately measure 15ml of liquid fuel.
This suggests that the ~1,500btu advantage, if real, of the 2:1 mix is not making it into the cooking pot. So I will discount that factor in my future decisions. Seems to me this means the remaining factors would be if:
- iso 91% is cheaper than methanol in your area.
- methanol has limited availability or supply and you want to stretch it
- you have a supply of iso you want to burn off
- you find the minimal yellowing of flame tips with 2:1 to be useful for flame visibility in daylight hours. Of course, this means it’d be more visible at night, too…