There's a big thread on that hose here:
http://www.yellowbullet.com/forum/showthread.php?t=461702
My take is that WTF else would it be for besides fuel? I think it's a CYA thing on their part because ethanol blends might mess with it and they haven't tested every blend. I've had parts store fuel line spring leaks in one year. That was on my Scout, which sits a lot.
I'm not unwilling to pay money for fuel line that is guaranteed safe, I just don't know where to get it. That blue stuff has been in the Blazer and Scout for a few years and no trouble so far.
http://www.yellowbullet.com/forum/showthread.php?t=461702
My take is that WTF else would it be for besides fuel? I think it's a CYA thing on their part because ethanol blends might mess with it and they haven't tested every blend. I've had parts store fuel line spring leaks in one year. That was on my Scout, which sits a lot.
I'm not unwilling to pay money for fuel line that is guaranteed safe, I just don't know where to get it. That blue stuff has been in the Blazer and Scout for a few years and no trouble so far.