E10 literally turned the gas lines into gel, but SeaDoo did not use A1 rated marine gas lines on the 1996 GTX. If you have an older model jetski and an additive can prevent this from happening, that is well worth it. I did all the work myself but it probably would have been north of $1,000 to have a shop do it.
Personally, I hate E10, it is just horrible. It is almost impossible to find fuel in Laconia without Ethanol. When we snowmobile in Canada, we fill the sleds there as there is no Ethanol added to their gas.
Jetskier