this motor will work fine. any 40-50 size two stroke will work. i have been using it's older brother, the .46 fx, (almost identical) for years now with great success, and would highly reccomend the AX. it is very reliable. however, other comprable engines out there would be the evolution .46 or the tt pro .46 off the top of my head, and they will all work very well. a bit of advice though, any time you post something that contains the words "after run oil" or "best" will usually receive a flurry of different opinions and just confuse the person asking.