My Tower .46 took more than 3 or 4 tank's of fuel it took something close to 9 tank's of fuel.also did the 30 sec. interval for 5 pinch thing, and also running it on the rich side till I see a nice trail of smoke behind my SE, got graet power I'd say more than a GMS .47. It's funny I had to buy 3 of tower's engine's to finally get to understand them but once broken in they really go. Had my tower hobbies .46 on an uproar & pulled it way hard ,so hard it ripped off the left wing in a snap roll, thinking of getting there .75 for a King Kobra.