I am borrowing my neighbors gas-powered power washer. It has a nice little 8hp Honda engine, 3000psi/3gpm. We are both "yard guys" and have a mess of small-engine equipment between us. So, he says, "make sure you put super unleaded in that thing when you are done." He goes on to say how super unleaded is "better" for small engines, something about high compression etc etc. I vaguely remembered NOT to use super unleaded in these motors because I thought I remembered it burning hotter. Clearly I don't have a clue, is my neighbor right?