So I am relatively new to gas engines, going on my third season with gas. I have seen two types of fuel line. Tygon yellow but it comes in two types. One is clear and stiff, the other is milky yellow like glow line and softer. I have found that the clear stiffer is cracking and gets really hard in cold weather. I really haven't used the softer stuff. I have had the clear line crack on me and I am trying to find the best gas fuel line that wont crack. Any suggestions would be great.

Here is what I have been using and it has been cracking.
Sullivan fuel line.

This is the softer silicone from dubro, never used this stuff.


Here is what has been happening with the Sullivan clear line.



So what is the best fuel line to use on gas?

TB