Yup, a good bath for about 6 hrs will more than double the value especially with a title. As far as the fuel goes I have heard many many methods. Nothing wrong with octane, just no need to over octane a motor. Basically you do not want to detonate with the lower octane numbers. In Las vegas i can buy 100 octane at the pump. If your motors are not full on wild builds. I do not see any reason you would need more than that octane level. As far as oil  mixes go, i have ran all the way from 20:1 to 150:1 amsoil sabre! And all the motors lived in racing enviroments. A lot of people will chime in. But, somewhere around 32:1 proper jetting and timing, and cooling system you should have no problems. Yes, I have even ran outboard motor oil from walmart @ 50:1 for long periods of time just to show my riding buddies that you do not need to spend 15 dollars a quart lol! Stuff is actually pretty good. I do still run it from time to time. A lot of the premix oils are priced by "appeal".