[masraum]

My understanding is that the fuel lines, parts, etc... on modern vehicles are fine as long as the ethanol content doesn't exceed a certain amount (10%, 15%, something like that).

Here, it's almost impossible to find gas that doesn't have 10% ethanol. I'm only aware of one gas station that has ethanol free gas (used to be 91 octane, but I noticed the other day that it's now 87 octane).

Unlike older vehicles that have parts that degrade in the presence of ethanol.

I want to say that the change is ~2000. But I can't give you any specifics other than the vague recollections that I've posted above.