You're talking about PVC, but posting a screenshot of polyurethane - they're different.

And PVC dissolves with some automotive chemicals (like some brake/carb cleaners). It softens substantially at relatively low temperatures. You say your truck never runs above 190, but that's the COOLANT temperature - not the underhood temp, which can approach 1,000°F near the exhaust manifolds, and up the firewall nearby. And the pressure listed is internal - vacuum means external pressure, which affects the tubing differently. Vulcanized rubber & thick-walled silicone can tolerate higher temperatures without collapsing.

Use what you want, but clear vinyl or PU tubing are NOT automotive products.

 

Im well aware of the differences in pvc and polyurethane. I meant to mention both in the post but thats not really the point. My option has held just fine. the ol man uses polyurethane on his airplane even which is why I feel I can trust it. And silicone is a no no around any petroleum. So chemical wise its kinda a catch 22. Polyurethane is whats on my truck and is an automotive product.... heres a link: http://www.newageindustries.com/polyurethane_hose.asp
Im not sayin silicone or nylon are not ok choices. They are more than perfectly fine. Im just giving another option incase the op would like to look into it....... so keep us posted and let us know what you go with and how it goes.

 

So since we dont reqlly agre on the mentioned materials in the previous post. we all agree that probably BEST all around is vulcanized rubber? Im all for it.