LOL to funny I think if gas engines did this a lot of the 3-D pilots would be sending there engines Back. its been my experiance that the engine will lean to the point where it will not hesitate on throttle up and without the dread 4 stroking burbleing after you run about 4 gal. through it Im on my 2nd 58 GX and its had 3 gal Ive flown it lean enought to not burble the last time i flew it but on the touch and goes at the end of the flight it was still hesitating on throttle up but this was after a 10 min flight and a longer time at idle durring approch Ive reset the neddle to a ritcher setting for the4th gal as a rule its about 4 gal before it will take a leaner setting without the hesitation I found this to be true with my DA 50 as well as my last Evolution 58