I have about 4 gallons thru my Evolution 58 in a 30% BME Edge. Recently switched mix from 30:1 to 40:1. This engine runs like a swiss watch, and has plenty of extra power on a 23X10 NX prop. I only have had one issue with it when I went deadstick on a low pass. Turns out the carb plate vibrated loose. I cant blame this on anyone but myself for not using loctite. Quick repair and back in the air. The sound of this beast on low passes certainly gets the attention of the others at my field.