strange --I ran the ST2300s and on a 20 oz tank - I used most of it for an IMACpattern - I paid 16 bucks a gallon for #2 Magnum 128 ozs /20=less than 7 flights per gallon -in actual use NEVER 10 flights in a gallon ($1.60 per flight at best)
My piped Tigres ran very hard the typical 18x8 at over 9000 on the ground.
power comes from fuel efficiently used - the engine is just a converter
so I made my choice to jump to a light weight 40 gasser and it ---works for me .