I dont agree with that "guru",when I switched from 15% to 20&30% in my Saito 150, my run times went up from 16-18min. to 23-25min. on a 16oz tank! I do stay in 3-D mode alot though, so i'm not at full throttle much. You should be resetting the high & low end to benefit from the extra punch, I had to lean out the high end quite a bit,doesnt leaning mean you are using less?