I am seeing Gates and Dayco fuel lines lasting months before they begin to crack and check whether running gasoline or diesel.
I am also now seeing vapor lock in summer temperatures on carbed vehicles that I have owned and driven since the late ‘80’s pretty much unchanged.
We just got back from a trip to high altitudes in Colorado and we vapor locked frame mounted electric EFI pump repeatedly that is away from heat sources and below tank level.
And now the idiots at the EPA want to go from 10% ethanol to 15%.
And those hoses are made in the US, not China, despite what I’m sure nascarnation will now claim.
The only ‘rubber’ hose I’ve seen hold up to ethanol without degrading significantly is that Goodyear lined (it used to have a blue inner layer, very obvious) stuff that AutoZone carried for a couple years: http://www.goodyearep.com/ProductsDetail.aspx?id=5144 I still have a stash of that for my vehicles, but that only takes care of connecting the fuel system components, not the components themselves.
I don’t understand your comment about diesel fuel lines.
Biodiesel doesn’t contain ethanol, it has soybean oil.