There is a difference between clear plastic's ability to withstand the effects of gasoline, IE will it dissolve in a couple of days, and it's long term stability as a plastic, ie will it harden up in time.
I bought clear plastic tubing clearly labeled for gasoline use and in a year it had hardened to the point where it wouldn't release from the barbs on the petcock nipples without a great deal of prying. The flexibility was 25% of that when new. And, hose clamps were REQUIRED to get the hoses sealed back on the nipples. The following year, the tubing broke off during the attemp at removal from the petcock. Any deflection of the tubing resulted in a clean break. On the bright side, it was still mostly clear, and it didn't dissolve in gasoline.
On the other hand I observe that the black tubing Honda used, while clearly not as flexible as new, still seals onto the petcock nipples WITHOUT any clamp whatsoever, and is still flexible enough for safe use. Though, it is starting split at the ends after 30 tears.
I'm currently using tygon in my model airplanes. I only have two years experience with this type. It is still functional, but I think it, too, is hardening. I expect to replace it all in the next year. I haven't found a light weight alternative, yet.
There are hundreds, perhaps thousands, of formula for plastics. But, package labeling is designed for marketing and sales of product. And, all too often, has little or no bearing on the quality of the product.
I wish you luck with your choices,
