What would parts be like that were strong enough to survive the corrosive effects of ethanol? Forget suing Honda, I want to sue big corn and the tyrants at the EPA and enviro-whacko groups that forced this crap on us.
Not sure what you're asking, but fuel lines would be stainless or fluoroelastomer, nickel-plated parts with buna or viton gaskets or seals. This would be pretty well-known to a car company.
One generally cannot sue the Feds unless Congress permits it.