Unless you know what you are doing run gas. These other fuels while are better performing have many draw backs and are a high maintenance. Meaning when done you have to flush the system out get ALL the methanol or alcohol or whatever out of the system, change oil after every run rebuild quicker, all rsulting in more dollars spent. And like mentioned earlier if you ran enough comression to warrant the use and reap the benifit of the other fuels you would not start it with a stock starter.