Varies too much and have a lot of saws now. I rotate them around, run them dry sometimes but not all the time. The echo powerblend plus no E fuel seems to hang in there OK.. I guess, on an average, a few times a week, sometimes several tanks a session, sometimes only like ten cuts. then I try out new rebuilds and tuning in the scrap log/bummer round pile.
If I am not planning on using this or that particlar saw anytime soon, I drain it back into the jug, because I need it for some other thirsty machine! hahahaha.
I am actually right now hovering-thinking about it seriously- on switching from mixing two gallon batches to a full five gallon can. I cut a lot more than I did before I joined this site....
And I just got another project saw that I can combine with another similar and make one good one (started on that one already, few more afternoons spare time it should be a runner), and another even larger wood chewer coming soon, big boys...I *can't wait* ....I'll be burning some mix.... (pics when it happens of course)