And bumblebees can't fly!

I've used teflon tape numerous times when R&Ring carbs. Has never failed me. . Using red engine assembly grease, have found been unable to guarantee no leaks,,,possibly unless I am willing to tighten ferrules tighter than I deem safe.

Have often used in other applications over my many years as is recommended, but at a few times of memory tape has been my go to solution for recalcitrant leaks.

Always cautious to ensure that tape not find its way into undesired areas, understanding the implications.

If it did not work for me, I certainly would be unable to use the car and would be forced to buy a replacement fuel line system or devise another solution.