Never looked to see how much remained in the tank but how long a tank lasts depends on the task .
Felling and delimbing hardwoods burn the least fuel so longest runtime , softwood felling and delimbing give you the least runtime if you're going to the top and they're small and short .
Different tasks , different mileage .
I run a 14" on mine , my selling firewood pile has up to a few 20" so I don't bother changing , I'll block wood for 6hr to 8hr with the 241 as the main saw , run a few tanks through the 026/034/361 to change things up .
I've had a 346OE but couldn't warm up to it , hard to quantify why but I sent that one down the road .
Over the next little bit I'm gonna drag the 241 to the shop and give it a muffler mod .