I’ve played around with a lot of different HX pots. I doubt any of those currently made are ideally matched to any stove for optimum fuel efficiency – at least none that I’ve yet found to this point.
Typically an HX pot will use around 1.5 g less fuel per 500ml boil over a conventional (and equal dimension) pot. So roughly 20 – 30% better fuel efficiency.
The “best” I’ve found is still the Jetboil, because the burner size, burner head shape, pot bottom size, and burner head to pot bottom spacing ratio are all carefully designed to work together for optimum efficiency.
But even the lightest Jetboils (I have a Sol Ti) still aren’t light.
With no wind, all the stoves I’ve played with are most fuel efficient on their low setting. Kick up the wind, and you’ve got to go up from the Low setting (often to full High) in order to use the least amount of fuel per 500ml H2O boiled.
Data from some recent testing:
Jetboil Sol Ti on Low setting can bring 500ML of water to a boil (5,020′ elev / 56*F H2O / 74*F Air Temp) in 6:22 @ 4.7 g fuel used.
Soto Windmaster w/ Triflex using the Fire Maple G3 Pot (sitting in the slots) on Low setting can bring 500ML of water to a boil (5,020′ elev / 56*F H2O / 74*F Air Temp) in 6:05 @ 6.3 g fuel used.
The MSR Pocket Rocket Deluxe using the Fire Maple G3 Pot (sitting in the slots) on Low setting can bring 500ML of water to a boil (5,020′ elev / 56*F H2O / 74*F Air Temp) in 6:22 @ 6.5 g fuel used.
So both the Soto WM and MSR PRDLX are essentially the same.
Weirdly, the closest I have come to the Jetboil Sol Al & Ti’s efficiency is a highly modified FM Quickboil Pro with modified BRS stove, but the boil time was looong.
Modified BRS 3000 using a modified Fire Maple QB Pro Pot (sitting in the slots) on Low setting can bring 500ML of water to a boil (5,020′ elev / 56*F H2O / 74*F Air Temp) in 8:40 @ 5.1 g fuel used.
Bottom line, on a typical backpack trip under 7 days, or a thru hike of the AT or PCT, I wouldn’t bother with an HX pot – they are heavier. On an unsupported, true wilderness trip over 10 days I definitely would consider one. Then the fuel savings would start adding up, and offset the additional HX pot weight.
Some random Saturday thoughts…