What are some of the experiences of the 55 56 57 brotherhood and the evil ethanol added fuel these days. I have a 57 with an original in line six and I have had to rebuild my carb twice in three years and replaced a float as well. I am now using the rich mans grade 91 with no ethanol, as of fall of 2020. I am keeping a close eye on my motor to makes sure this makes any sense. By the way both times my carb was completely and properly rebuilt. I would like to hear some of the real world experiences on this matter. Cheers.